List of longest streams of Oregon

A wide placid river flows through the woods.
Rogue River (seventh longest) near Indian Mary Park in Josephine County

Seventy-seven rivers and creeks of at least 50 miles (80 km) in total length are the longest streams of the U.S. state of Oregon. All of these streams originate in the United States except the longest, the Columbia, which begins in the Canadian province of British Columbia and flows 1,249 miles (2,010 km) to the sea near Astoria. The second-longest, the Snake River, which at 1,078 miles (1,735 km) is the only other stream of more than 1,000 miles (1,600 km) on the list, begins in Wyoming and flows through parts of Idaho and Washington, as well as Oregon. Some of the other streams also cross borders between Oregon and California, Nevada, Idaho, or Washington, but the majority flow entirely within Oregon.

The Atlas of Oregon ranks 31 rivers in the state by average streamflow; the top five are the Columbia, Snake, Willamette, Santiam, and Umpqua.[1] Not all Oregon rivers with high average flows are on this list of longest streams because neither their main stems nor any of their tributaries (including what are called "forks") are at least 50 miles (80 km) long. High-flow streams mentioned in the Atlas but not included in this long-stream list are the Metolius, Hood, Youngs, and Coos rivers. On the other hand, the list includes four low-flow intermittent streams—Dry River, Rattlesnake Creek, Rock Creek, and Dry Creek—that cross parts of the Oregon High Desert.

The direction of Oregon stream flow is influenced by four major drainage divides: the Oregon Coast Range on the west, the Cascade Range further inland, the Klamath–Siskiyou Mountains in the southwest, and the Blue Mountains in the northeast. One set of streams, including the Nehalem River, flows directly into the Pacific Ocean or into larger streams flowing directly to the Pacific; other streams, such as the Deschutes River, flow into the Columbia River or its tributaries. A third set, including the Klamath River and its tributaries, originates in Oregon, but its waters eventually flow into northern California before reaching the ocean. Other streams like the Donner und Blitzen River flow into closed basins, such as Malheur Lake, that have no outlet to the sea.[1]

Source data for the table below came from topographic maps created by the United States Geological Survey and published on-line by TopoQuest,[2] and from the Atlas of Oregon;[1] the Oregon Atlas and Gazetteer;[3] two federally produced geographic information system (GIS) datasets—the National Hydrography Dataset and the National Watershed Boundary Dataset—and other sources as noted. In the table, total lengths are given in miles (mi) and kilometers (km), and elevations are in feet (ft) and meters (m).

Rivers and creeks

A snow-covered mountain in the background with forests in the foreground and a river running through
Sandy River, 63rd longest 
A waterfall in the middle of a forest, surrounded by rocks covered in lichen
McKenzie River, 26th longest 
A river gorge, with a forest in the foreground
Columbia River, longest 
The confluence of two rivers, with rough white water over rocks, and trees on either side
North Umpqua River, 18th longest 
A river winding through a narrow canyon with tall foliage-covered mountains on either side
Snake River, 2nd longest 
A river with several logs in it, and large rocks in the foreground
Nestucca River, 67th longest 
Key
Stream is not entirely within the state Stream is not entirely within the state
Longest streams of Oregon
Name Mouth[4] Total length Watershed
area		 Mouth
coordinates[5]		 Mouth elevation[5] Source
coordinates[5]		 Source elevation[6] Source and mouth
locations[4]
Columbia River Pacific Ocean 1,249 mi
2,010 kmdagger[7][n 1]		 258,000 mi2
668,000 km2[7]		 46°14′39″N 124°03′29″W / 46.24417°N 124.05806°W / 46.24417; -124.05806 (Columbia River (mouth))[9] 0 ft
0 m 		50°13′00″N 115°51′00″W / 50.21667°N 115.85000°W / 50.21667; -115.85000 (Columbia River (source))[10] 2,657 ft
810 m		 Source at Columbia Lake, British Columbia, mouth near Astoria
Snake River Columbia River 1,078 mi
1,674 kmdagger[11][n 2]		 108,000 mi2
280,000 km2[7]		 46°11′10″N 119°01′43″W / 46.18611°N 119.02861°W / 46.18611; -119.02861 (Snake River (mouth)) 358 ft
109 m		 44°07′49″N 110°13′10″W / 44.13028°N 110.21944°W / 44.13028; -110.21944 (Snake River (source))[12] 9,199 ft
2,804 m		 Source in Absaroka Range, Wyoming, mouth near Tri-Cities, Washington
Owyhee River Snake River 346 mi
557 kmdagger[11][n 3]		 11,049 mi2
28,617 km2[14]		43°48′46″N 117°01′32″W / 43.81278°N 117.02556°W / 43.81278; -117.02556 (Owyhee River (mouth)) 3,185 ft
666 ft 		41°30′17″N 115°44′30″W / 41.50472°N 115.74167°W / 41.50472; -115.74167 (Owyhee River (source))[15] 6,918 ft
2,109 m		 Source in Independence Mountains of Nevada, mouth near Nyssa
Klamath River Pacific Ocean 287 mi
462 kmdagger[16][n 4]		 15,700 mi2
40,700 km2[16]		 41°32′49″N 124°05′00″W / 41.54694°N 124.08333°W / 41.54694; -124.08333 (Klamath River (mouth)) 0 ft
0 m		 42°11′29″N 121°46′58″W / 42.19139°N 121.78278°W / 42.19139; -121.78278 (Klamath River (source))[17] 4,090 ft
1,247 m		 Source at Upper Klamath Lake, mouth near Crescent City, California
John Day River Columbia River 284 mi
457 km[18]		 8,100 mi2
21,000 km2[19]		 45°43′57″N 120°38′57″W / 45.73250°N 120.64917°W / 45.73250; -120.64917 (John Day River (mouth)) 269 ft
82 m		 44°14′44″N 118°33′08″W / 44.24556°N 118.55222°W / 44.24556; -118.55222 (John Day River (source))[20] 6,676 ft
2,035 m		Source in Strawberry Range, mouth near Rufus
Deschutes River Columbia River 251 mi
405 km[21]		10,400 mi2
26,939 km2[21]		 45°38′07″N 120°54′52″W / 45.63528°N 120.91444°W / 45.63528; -120.91444 (Deschutes River (mouth)) 164 ft
50 m		 43°54′33″N 121°45′40″W / 43.90917°N 121.76111°W / 43.90917; -121.76111 (Deschutes River (source))[22] 4,747 ft
1,447 m		 Source in Cascade Range, mouth near Biggs Junction
Rogue River Pacific Ocean 215 mi
346 km[23]		5,200 mi2
13,400 km2[24]		 42°25′21″N 124°25′45″W / 42.42250°N 124.42917°W / 42.42250; -124.42917 (Rogue River (mouth)) 0 ft
0 m 		43°03′57″N 122°13′56″W / 43.06583°N 122.23222°W / 43.06583; -122.23222 (Rogue River (source))[25] 5,320 ft
1,622 m 		Source in Cascade Range, mouth near Gold Beach
Malheur River Snake River 190 mi
306 km[26]		 5,000 mi2
11,940 km2[26]		44°03′33″N 116°58′31″W / 44.05917°N 116.97528°W / 44.05917; -116.97528 (Malheur River (mouth))2,133 ft
650 m		 44°08′05″N 118°37′14″W / 44.13472°N 118.62056°W / 44.13472; -118.62056 (Malheur River (source))[27] 4,958 ft
1,511 m		 Source in Strawberry Range, mouth near Ontario
Willamette River Columbia River 187 mi
301 km[28]		 11,400 mi2
30,000 km2[7]		 45°39′10″N 122°45′53″W / 45.65278°N 122.76472°W / 45.65278; -122.76472 (Willamette River (mouth)) 10 ft
3 m 		44°01′23″N 123°01′25″W / 44.02306°N 123.02361°W / 44.02306; -123.02361 (Willamette River (source))[29] 438 ft
134 m		 Source near Eugene, mouth near Portland
Grande Ronde River Snake River 182 mi
339 kmdagger[11][n 5]		4,000 mi2
10,240 km2[31]		 46°04′49″N 116°58′47″W / 46.08028°N 116.97972°W / 46.08028; -116.97972 (Grande Ronde River (mouth)) 820 ft
250 m		 44°57′34″N 118°15′38″W / 44.95944°N 118.26056°W / 44.95944; -118.26056 (Grande Ronde River (source))[32] 7,446 ft
2,270 m		 Source in Blue Mountains, mouth on Washington–Idaho border
Powder River Snake River 153 mi
246 km[11]		1,720 mi2
4,455 km2[33]		 44°44′37″N 117°02′56″W / 44.74361°N 117.04889°W / 44.74361; -117.04889 (Powder River (mouth)) 2,064 ft
629 m		 44°44′30″N 118°12′22″W / 44.74167°N 118.20611°W / 44.74167; -118.20611 (Powder River (source))[34] 4,402 ft
1,342 m		 Source in Blue Mountains, mouth near Richland
Crooked River Deschutes River 125 mi
201 km[35]		 4,300 mi2
11,137 km2[21]		44°34′25″N 121°16′19″W / 44.57361°N 121.27194°W / 44.57361; -121.27194 (Crooked River (mouth)) 1,949 ft
594 m		 44°06′05″N 120°03′04″W / 44.10139°N 120.05111°W / 44.10139; -120.05111 (Crooked River (source))[36] 3,624 ft
1,105 m		 Source near Ochoco Mountains, mouth near Culver
Middle Fork Willamette River Willamette River 122 mi
196 km[7][37]		1,355 mi2
3,510 km2[28]		44°01′23″N 123°01′25″W / 44.02306°N 123.02361°W / 44.02306; -123.02361 (Middle Fork Willamette River (mouth)) 436 ft
133 m 		43°24′28″N 122°06′20″W / 43.40778°N 122.10556°W / 43.40778; -122.10556 (Middle Fork Willamette River (source))[38] 5,552 ft
1,692 m		 Source in Calapooya Mountains, mouth near Springfield
Nehalem River Pacific Ocean 119 mi
192 km[39]		 855 mi2
2,214 km2[39]		 45°39′29″N 123°56′04″W / 45.65806°N 123.93444°W / 45.65806; -123.93444 (Nehalem River (mouth)) 0 ft
0 m		 45°43′53″N 123°25′26″W / 45.73139°N 123.42389°W / 45.73139; -123.42389 (Nehalem River (source))[40] 2,420 ft
740 m		 Source in Northern Oregon Coast Range, mouth near Wheeler
North Fork John Day River John Day River 117 mi
188 km[18]		 600 mi2
1,554 km2[18]		44°45′22″N 119°38′19″W / 44.75611°N 119.63861°W / 44.75611; -119.63861 (North Fork John Day River (mouth)) 1,834 ft
559 m		44°51′48″N 118°14′13″W / 44.86333°N 118.23694°W / 44.86333; -118.23694 (North Fork John Day River (source))[41] 7,420 ft
2,260 m		 Source in Elkhorn Mountains, mouth near Kimberly
Umpqua River Pacific Ocean 112 mi
180 km[42]		4,685 mi2
12,133 km2[43]		 43°40′09″N 124°12′18″W / 43.66917°N 124.20500°W / 43.66917; -124.20500 (Umpqua River (mouth)) 0 ft
0 m		 43°16′05″N 123°26′46″W / 43.26806°N 123.44611°W / 43.26806; -123.44611 (Umpqua River (source))[44] 362 ft
110 m		 Source near Roseburg, mouth near Reedsport
Siuslaw River Pacific Ocean 110 mi
180 km[45]		 773 mi2
2,000 km2[46]		 44°01′01″N 124°08′14″W / 44.01694°N 124.13722°W / 44.01694; -124.13722 (Siuslaw River (mouth)) 0 ft
0 m		 43°49′23″N 123°15′42″W / 43.82306°N 123.26167°W / 43.82306; -123.26167 (Siuslaw River (source))[47] 632 ft
193 m		 Source in Central Oregon Coast Range, mouth at Florence
North Umpqua River Umpqua River 110 mi
170 km[48]		 1,373 mi2
3,560 km2[49]		 43°16′05″N 123°26′45″W / 43.26806°N 123.44583°W / 43.26806; -123.44583 (North Umpqua River (mouth)) 361 ft
110 m		43°15′24″N 122°00′03″W / 43.25667°N 122.00083°W / 43.25667; -122.00083 (North Umpqua River (source))[50] 5,985 ft
1,824 m		 Source in Cascade Range, mouth near Roseburg
South Umpqua River Umpqua River110 mi
170 km[48]		 1,800 mi2
 4,700 km2[51]		 43°16′04″N 123°26′46″W / 43.26778°N 123.44611°W / 43.26778; -123.44611 (South Umpqua River (mouth)) 361 ft
110 m		 43°06′26″N 122°35′22″W / 43.10722°N 122.58944°W / 43.10722; -122.58944 (South Umpqua River (source))[52] 2,009 ft
612 m		 Source in Cascade Range, mouth near Roseburg
Jordan Creek Owyhee River 99 mi
159 kmdagger[11] [n 6]		1,305 mi2
3,380 km2[53]		 42°51′45″N 117°38′29″W / 42.86250°N 117.64139°W / 42.86250; -117.64139 (Jordan Creek (mouth)) 3,363 ft
1,025 m		 42°58′21″N 116°44′39″W / 42.97250°N 116.74417°W / 42.97250; -116.74417 (Jordan Creek (source))[54] 7,551 ft
2,302 m		 Source in Owyhee Mountains of Idaho, mouth near Rome
Burnt River Snake River98 mi
158 km[11]		1,090 mi2
2,823 km2[33]		44°21′54″N 117°13′34″W / 44.36500°N 117.22611°W / 44.36500; -117.22611 (Burnt River (mouth))2,073 ft
632 m		44°30′15″N 118°10′51″W / 44.50417°N 118.18083°W / 44.50417; -118.18083 (Burnt River (source))[55]3,824 ft
1,166 m 		Source in Blue Mountains, mouth near Huntington
Silvies River Malheur Lake 95 mi
153 km[56]		 1,273 mi2
3,300 km2[57]		43°34′05″N 119°02′04″W / 43.56806°N 119.03444°W / 43.56806; -119.03444 (Silvies River (mouth))4,150 ft
1,265 m		 44°07′19″N 119°13′53″W / 44.12194°N 119.23139°W / 44.12194; -119.23139 (Silvies River (source))[58] 5,649 ft
1,722 m		 Source in Blue Mountains, mouth near Burns
North Santiam River Santiam River 92 mi
148 km[59]		 766 mi2
1,984 km2[59]		 44°41′12″N 123°00′24″W / 44.68667°N 123.00667°W / 44.68667; -123.00667 (North Santiam River (mouth)) 217 ft
66 m		 44°28′39″N 121°53′04″W / 44.47750°N 121.88444°W / 44.47750; -121.88444 (North Santiam River (source))[60] 5,133 ft
1,565 m		 Source in Cascade Range, mouth in Willamette Valley
Little Deschutes River Deschutes River92 mi
146 km[61]		1,020 mi2
2,642 km2[21]		43°51′14″N 121°27′14″W / 43.85389°N 121.45389°W / 43.85389; -121.45389 (Little Deschutes River (mouth))4,163 ft
1,269 m		43°18′25″N 121°59′43″W / 43.30694°N 121.99528°W / 43.30694; -121.99528 (Little Deschutes River (source))[62]6,219 ft
1,896 m 		Source in Cascade Range, mouth near Sunriver
Smith River Umpqua River90 mi
140 km[63]		218 mi2
565 km2[64]		43°44′13″N 124°04′43″W / 43.73694°N 124.07861°W / 43.73694; -124.07861 (Smith River (mouth))0 mi
0 km		43°44′25″N 123°20′22″W / 43.74028°N 123.33944°W / 43.74028; -123.33944 (Smith River (source))[65] 1,406 ft
429 m 		Source in Central Oregon Coast Range, mouth near Reedsport
McKenzie River Willamette River90 mi
145 km[28]		 1,300 mi2
3,367 km2[66] 		44°07′32″N 123°06′20″W / 44.12556°N 123.10556°W / 44.12556; -123.10556 (McKenzie River (mouth))371 ft
113 m		44°21′37″N 121°59′39″W / 44.36028°N 121.99417°W / 44.36028; -121.99417 (McKenzie River (source))[67]3,570 ft
1,088 m 		Source in Cascade Range, mouth near Eugene
Umatilla River Columbia River89 mi
143 km[68]		2,540 mi2
6,579 km2[68]		45°55′09″N 119°21′20″W / 45.91917°N 119.35556°W / 45.91917; -119.35556 (Umatilla River (mouth))269 ft
82 m		45°43′32″N 118°11′17″W / 45.72556°N 118.18806°W / 45.72556; -118.18806 (Umatilla River (source))[69]2,332 ft
711 m		Source in Blue Mountains, mouth at Umatilla
Dry River (intermittent) Crooked River88 mi
142 km[11]		752 mi2
1,948 km2[70]		44°20′10″N 121°02′50″W / 44.33611°N 121.04722°W / 44.33611; -121.04722 (Dry River (mouth))2,782 ft
848 m		43°46′56″N 120°16′44″W / 43.78222°N 120.27889°W / 43.78222; -120.27889 (Dry River (source))[71]5,886 ft
1,794 m		Source in Hampton Buttes near Brothers, mouth upstream of Smith Rock
Silver Creek Harney Lake87 mi
140 km[11]		1,700 mi2
4,403 km2[72]		43°15′47″N 119°11′21″W / 43.26306°N 119.18917°W / 43.26306; -119.18917 (Silver Creek (mouth))4,101 ft
1,250 m		43°56′28″N 119°33′25″W / 43.94111°N 119.55694°W / 43.94111; -119.55694 (Silver Creek (source))[73]5,830 ft
1,777 m		Source in Malheur National Forest, mouth at Harney Lake
Sprague River Williamson River84 mi
135 km[74]		1,560 mi2
4,050 km2[74]		42°34′16″N 121°52′28″W / 42.57111°N 121.87444°W / 42.57111; -121.87444 (Sprague River (mouth)) 4,163 ft
1,269 m		42°26′16″N 121°06′34″W / 42.43778°N 121.10944°W / 42.43778; -121.10944 (Sprague River (source))[75]4,326 ft
1,319 m 		Source on high plateau of eastern Klamath County, mouth near Chiloquin
Clackamas River Willamette River83 mi
134 km[76] 		940 mi2
2,435 km2[28]		45°22′21″N 122°36′31″W / 45.37250°N 122.60861°W / 45.37250; -122.60861 (Clackamas River (mouth))10 ft
3 m 		44°49′17″N 121°47′47″W / 44.82139°N 121.79639°W / 44.82139; -121.79639 (Clackamas River (source))[77]4,904 ft
1,496 m		Source in Cascade Range, mouth at Gladstone and Oregon City
Tualatin River Willamette River83 mi
134 km[78]		712 mi2
1,844 km2[78] 		45°20′17″N 122°39′05″W / 45.33806°N 122.65139°W / 45.33806; -122.65139 (Tualatin River (mouth)) 59 ft
18 m 		45°28′55″N 123°24′21″W / 45.48194°N 123.40583°W / 45.48194; -123.40583 (Tualatin River (source))[79] 1,978 ft
603 m 		Source in Northern Oregon Coast Range, mouth near West Linn
Rock Creek John Day River82 mi
132 km[11]		507 mi2
1,313 km2[70]		45°34′36″N 120°24′17″W / 45.57667°N 120.40472°W / 45.57667; -120.40472 (Rock Creek (John Day; mouth))404 ft
123 m		45°02′00″N 119°34′35″W / 45.03333°N 119.57639°W / 45.03333; -119.57639 (Rock Creek (John Day; source))[80]4,351 ft
1,326 m		Source in Umatilla National Forest, mouth east of Wasco
Willow Creek Columbia River79 mi
127 km[81]		880 mi2
2,279 km2[81]		45°48′21″N 120°00′24″W / 45.80583°N 120.00667°W / 45.80583; -120.00667 (Willow Creek (Columbia River; mouth))269 ft
82 m		45°09′56″N 119°20′29″W / 45.16556°N 119.34139°W / 45.16556; -119.34139 (Willow Creek (Columbia River; source))[82]4,918 ft
1,499 m 		Source in Umatilla National Forest, mouth upstream of Arlington
South Fork Crooked River Crooked River76 mi
123 km[11]		1,530 mi2
4,000 km2[83]		44°06′05″N 120°03′04″W / 44.10139°N 120.05111°W / 44.10139; -120.05111 (SF Crooked River (mouth))3,622 ft
1,104 m		43°38′55″N 120°23′40″W / 43.64861°N 120.39444°W / 43.64861; -120.39444 (SF Crooked River (source))[84]4,779 ft
1,457 m		Source southeast of Brothers, mouth near Ochoco Mountains
Middle Fork John Day River North Fork John Day River75 mi
121 km[18]		321 mi2
833 km2[18] 		44°54′59″N 119°18′08″W / 44.91639°N 119.30222°W / 44.91639; -119.30222 (Middle Fork John Day River (mouth))2,198 ft
670 m 		44°35′05″N 118°25′48″W / 44.58472°N 118.43000°W / 44.58472; -118.43000 (Middle Fork John Day River (source))[85]4,253 ft
1,296 m 		Source in Blue Mountains, mouth near Monument
Cow Creek South Umpqua River 75 mi
121 km[86] 		456 mi2
1,181 km2[87]		42°56′49″N 123°20′16″W / 42.94694°N 123.33778°W / 42.94694; -123.33778 (Cow Creek (mouth))636 ft
194 m		42°48′09″N 122°59′30″W / 42.80250°N 122.99167°W / 42.80250; -122.99167 (Cow Creek (source))[88] 2,404 ft
733 m 		Source in Umpqua National Forest, mouth at Canyonville
Sycan River Sprague River75 mi
121 km[11] 		559 mi2
1,450 km2[89] 		42°27′40″N 121°17′13″W / 42.46111°N 121.28694°W / 42.46111; -121.28694 (Sycan River (mouth))4,311 ft
1,314 m		42°38′50″N 120°44′08″W / 42.64722°N 120.73556°W / 42.64722; -120.73556 (Sycan River (source))[90]7,075 ft
2,156 m 		Source on high plateau of eastern Klamath County, mouth at Beatty
Imnaha River Snake River73 mi
117 km[11]		855 mi2
2,214 km2[91]		45°49′03″N 116°45′53″W / 45.81750°N 116.76472°W / 45.81750; -116.76472 (Imnaha River (mouth))945 ft
288 m		45°06′47″N 117°07′31″W / 45.11306°N 117.12528°W / 45.11306; -117.12528 (Imnaha River (source))[92] 6,641 ft
2,024 m		Source in Wallowa Mountains, mouth on Idaho border
Calapooia River Willamette River72 mi
116 km[28]		 365 mi2
945 km2[28]		44°38′20″N 123°06′36″W / 44.63889°N 123.11000°W / 44.63889; -123.11000 (Calapooia River (mouth))180 ft
55 m 		44°15′54″N 122°19′25″W / 44.26500°N 122.32361°W / 44.26500; -122.32361 (Calapooia River (source))[93] 4,552 ft
1,387 m 		Source in Cascade Range, mouth at Albany
Williamson River Klamath River70 mi
110 km[94] 		3,000 mi2
7,800 km2[95]		42°27′53″N 121°57′25″W / 42.46472°N 121.95694°W / 42.46472; -121.95694 (Williamson River (mouth))4,147 ft
1,264 m		42°42′15″N 121°20′24″W / 42.70417°N 121.34000°W / 42.70417; -121.34000 (Williamson River (source))[96] 5,100 ft
1,600 m 		Source on high plateau of eastern Klamath County, mouth at Upper Klamath Lake
Succor Creek Snake River67 mi
108 kmdagger[97][n 7] 		494 mi2
1,279 km2[98]		43°37′55″N 116°56′47″W / 43.63194°N 116.94639°W / 43.63194; -116.94639 (Succor Creek (mouth))2,211 ft
674 m		43°05′45″N 116°50′18″W / 43.09583°N 116.83833°W / 43.09583; -116.83833 (Succor Creek (source))[99]6,976 ft
2,126 m		Source in Owyhee Mountains, mouth near Homedale, both in Idaho
Siletz River Pacific Ocean67 mi
108 km[100] 		373 mi2
970 km2[101]		44°54′12″N 124°00′41″W / 44.90333°N 124.01139°W / 44.90333; -124.01139 (Siletz River (mouth))0 ft
0 m		44°52′48″N 123°42′40″W / 44.88000°N 123.71111°W / 44.88000; -123.71111 (Siletz River (source))[102] 708 ft
216 m 		Source in Central Oregon Coast Range, mouth near Lincoln City
South Santiam River Santiam River66 mi
106 km [103] 		1,040 mi2
2,694 km2[104]		44°41′12″N 123°00′24″W / 44.68667°N 123.00667°W / 44.68667; -123.00667 (South Santiam River (mouth)) 217 ft
66 m 		44°22′27″N 122°13′05″W / 44.37417°N 122.21806°W / 44.37417; -122.21806 (South Santiam River (source))[105] 1,932 ft
589 m 		Source in Cascade Range, mouth in Willamette Valley
South Fork Coquille River Coquille River63 mi
101 km[106]		288 mi2
746 km2[106]		43°04′49″N 124°08′29″W / 43.08028°N 124.14139°W / 43.08028; -124.14139 (South Fork Coquille River (mouth))13 ft
4 m		42°50′24″N 123°52′30″W / 42.84000°N 123.87500°W / 42.84000; -123.87500 (South Fork Coquille River (source))[107]3,472 ft
1,058 m 		Source in Siskiyou National Forest, mouth near Myrtle Point
West Little Owyhee River Owyhee River63 mi
101 km[11]		310 mi2
803 km2[70]		42°27′10″N 117°12′34″W / 42.45278°N 117.20944°W / 42.45278; -117.20944 (West Little Owyhee River (mouth))4,373 ft
1,333 m		42°06′30″N 117°35′03″W / 42.10833°N 117.58417°W / 42.10833; -117.58417 (West Little Owyhee River (source))[108] 6,508 ft
1,984 m 		Source near McDermitt, mouth in Owyhee Desert
Pudding River Molalla River62 mi
100 km[109]		531 mi2
1,375 km2[110]		45°17′54″N 122°43′07″W / 45.29833°N 122.71861°W / 45.29833; -122.71861 (Pudding River (mouth))62 ft
19 m 		44°53′51″N 122°44′42″W / 44.89750°N 122.74500°W / 44.89750; -122.74500 (Pudding River (source))[111]950 ft
290 m		Source in Waldo Hills, mouth near Canby
Luckiamute River Willamette River62 mi
100 km[112]		315 mi2
816 km2[113]		44°45′15″N 123°08′54″W / 44.75417°N 123.14833°W / 44.75417; -123.14833 (Luckiamute River (mouth))164 ft
50 m		44°47′28″N 123°32′45″W / 44.79111°N 123.54583°W / 44.79111; -123.54583 (Luckiamute River (source))[114]2,684 ft
818 m		Source in Central Oregon Coast Range, mouth near Buena Vista
Bully Creek Malheur River62 mi
99 km[11] 		540 mi2
1,560 km2[115]		43°58′30″N 117°14′24″W / 43.97500°N 117.24000°W / 43.97500; -117.24000 (Bully Creek (mouth))2,244 ft
684 m 		44°05′25″N 118°05′55″W / 44.09028°N 118.09861°W / 44.09028; -118.09861 (Bully Creek (source))[116]4,278 ft
1,304 m		Source in Malheur County, mouth near Vale
South Fork John Day River John Day River60 mi
97 km[18]		607 mi2
1,570 km2[117] 		44°28′26″N 119°32′10″W / 44.47389°N 119.53611°W / 44.47389; -119.53611 (South Fork John Day River (mouth))2,329 ft
710 m		43°55′09″N 119°19′17″W / 43.91917°N 119.32139°W / 43.91917; -119.32139 (South Fork John Day River (source))[118] 5,400 ft
1,600 m 		Source in Ochoco Mountains, mouth near Dayville
Lost River Tule Lake60 mi
97 kmdagger[119][n 8] 		2,998 mi2
7,760 km2[120] 		41°56′24″N 121°30′19″W / 41.94000°N 121.50528°W / 41.94000; -121.50528 (Lost River (mouth))4,035 ft
1,230 m		41°55′34″N 121°04′33″W / 41.92611°N 121.07583°W / 41.92611; -121.07583 (Lost River (source))[121] 4,479 ft
1,365 m 		Source at Clear Lake Reservoir, mouth at Tule Lake, both in California
Donner und Blitzen River Malheur Lake60 mi
97 km[122]		791 mi2
2,050 km2[123]		43°17′30″N 118°49′12″W / 43.29167°N 118.82000°W / 43.29167; -118.82000 (Donner und Blitzen River (mouth))4,101 ft
1,250 m		42°32′02″N 118°43′52″W / 42.53389°N 118.73111°W / 42.53389; -118.73111 (Donner und Blitzen (source))[124] 6,526 ft
1989 m 		Source near Steens Mountain, mouth at Malheur Lake
South Yamhill River Yamhill River60 mi
97 km[125]		492 mi2
1,274 km2[126] 		45°13′33″N 123°08′41″W / 45.22583°N 123.14472°W / 45.22583; -123.14472 (South Yamhill River (mouth)) 75 ft
23 m 		45°06′38″N 123°43′40″W / 45.11056°N 123.72778°W / 45.11056; -123.72778 (South Yamhill River (source))[127] 551 ft
168 m 		Source in Northern Oregon Coast Range, mouth near McMinnville
North Fork Malheur River Malheur River59 mi
95 km[128] 		550 mi2
1,424 km2[129]		43°45′25″N 118°03′40″W / 43.75694°N 118.06111°W / 43.75694; -118.06111 (NF Malheur River (mouth))2,923 ft
891 m		44°21′58″N 118°24′16″W / 44.36611°N 118.40444°W / 44.36611; -118.40444 (NF Malheur River (source))[130]6,884 ft
2,098 m 		Source in Strawberry Range, mouth near Juntura
Yaquina River Pacific Ocean59 mi
95 km[131]		253 mi2
660 km2[131] 		44°36′44″N 124°01′04″W / 44.61222°N 124.01778°W / 44.61222; -124.01778 (Yaquina River (mouth))0 ft
0 m		44°44′57″N 123°36′06″W / 44.74917°N 123.60167°W / 44.74917; -123.60167 (Yaquina River (source))[132] 2,137 ft
651 m 		Source in Central Oregon Coast Range, mouth at Newport
Butter Creek Umatilla River57 mi
92 km[133]		465 mi2
1,204 km2[133]		45°47′41″N 119°19′44″W / 45.79472°N 119.32889°W / 45.79472; -119.32889 (Butter Creek (mouth))535 ft
163 m		45°12′24″N 119°10′25″W / 45.20667°N 119.17361°W / 45.20667; -119.17361 (Butter Creek (source))[134]5,034 ft
1,534 m 		Source in Umatilla National Forest, mouth upstream of Hermiston
Rattlesnake Creek (intermittent) Crooked Creek57 mi
92 km[11]		298 mi2
772 km2[70]		42°43′24″N 117°47′42″W / 42.72333°N 117.79500°W / 42.72333; -117.79500 (Rattlesnake Creek (mouth))3,770 ft
1,149 m		42°16′55″N 117°40′10″W / 42.28194°N 117.66944°W / 42.28194; -117.66944 (Rattlesnake Creek (source))[135]6,439 ft
1,963 m		Source in desert north of McDermitt, mouth near Burns Junction
Willow Creek Malheur River57 mi
92 km[136]		787 mi2
2,038 km2[137]		43°59′14″N 117°13′51″W / 43.98722°N 117.23083°W / 43.98722; -117.23083 (Willow Creek (Malheur River; mouth))2,234 ft
681 m		44°20′08″N 117°56′15″W / 44.33556°N 117.93750°W / 44.33556; -117.93750 (Willow Creek (Malheur River; source))[138]3,724 ft
1,135 m 		Source near Ironside, mouth near Vale
Chetco River Pacific Ocean56 mi
90 km[139] 		352 mi2
912 km2[139] 		42°02′43″N 124°16′14″W / 42.04528°N 124.27056°W / 42.04528; -124.27056 (Chetco River (mouth)) 0 ft
0 m		42°07′47″N 123°52′39″W / 42.12972°N 123.87750°W / 42.12972; -123.87750 (Chetco River (source))[140]3,201 ft
976 m 		Source in Klamath Mountains, mouth near Brookings
Illinois River Rogue River56 mi
97 km[141] 		983 mi2
2,546 km2[142] 		42°33′00″N 124°03′58″W / 42.55000°N 124.06611°W / 42.55000; -124.06611 (Illinois River (mouth)) 102 ft
31 m		42°09′35″N 123°39′33″W / 42.15972°N 123.65917°W / 42.15972; -123.65917 (Illinois River (source))[143] 1,275 ft
389 m 		Source near Cave Junction (between Klamath Mountains and Siskiyou Mountains), mouth near Agness
Rock Creek (intermittent) Catlow Valley56 mi
90 km[11]		269 mi2
697 km2[70]		42°39′41″N 119°10′08″W / 42.66139°N 119.16889°W / 42.66139; -119.16889 (Rock Creek (Catlow Valley; mouth))4,557 ft
1,389 m		42°26′57″N 119°41′33″W / 42.44917°N 119.69250°W / 42.44917; -119.69250 (Rock Creek (Catlow Valley; source))[144]6,896 ft
2,102 m		Source on Hart Mountain, mouth in Catlow Valley
Wallowa River Grande Ronde River 55 mi
89 km[145]		 956 mi2
2,480 km2[146] 		45°43′31″N 117°47′09″W / 45.72528°N 117.78583°W / 45.72528; -117.78583 (Wallowa River (mouth))2,316 ft
706 m		45°16′28″N 117°12′42″W / 45.27444°N 117.21167°W / 45.27444; -117.21167 (Wallowa River (source))[147] 4,498 ft
1,371 m 		Source in Wallowa Mountains, mouth downstream of Wallowa
Sandy River Columbia River55 mi
89 km[148]		508 mi2
1,316 km2[148]		45°34′05″N 122°24′03″W / 45.56806°N 122.40083°W / 45.56806; -122.40083 (Sandy River (mouth)) 10 ft
3 m 		45°22′32″N 121°43′45″W / 45.37556°N 121.72917°W / 45.37556; -121.72917 (Sandy River (source))[149]5,225 ft
1,593 m 		Source in Cascade Range, mouth near Troutdale
Long Tom River Willamette River55 mi
89 km[150]		410 mi2
1,062 km2[151]		44°22′48″N 123°14′54″W / 44.38000°N 123.24833°W / 44.38000; -123.24833 (Long Tom River (mouth))256 ft
78 m		44°13′12″N 123°26′39″W / 44.22000°N 123.44417°W / 44.22000; -123.44417 (Long Tom River (source))[152]1,400 ft
427 m		Source near Low Pass, mouth north of Monroe
Fifteenmile Creek Columbia River54 mi
87 km[11]		373 mi2
966 km2[153]		45°36′50″N 121°07′22″W / 45.61389°N 121.12278°W / 45.61389; -121.12278 (Fifteenmile Creek (mouth))95 ft
29 m		45°20′35″N 121°31′18″W / 45.34306°N 121.52167°W / 45.34306; -121.52167 (Fifteenmile Creek (source))[154]6,178 ft
1,883 m		Source in Mount Hood National Forest, mouth near The Dalles
Dry Creek (intermittent) Crooked Creek54 mi
86 km[11]		499 mi2
1,184 km2[70]		42°47′42″N 117°44′47″W / 42.79500°N 117.74639°W / 42.79500; -117.74639 (Dry Creek (mouth))3,570 ft
1,088 m		42°30′31″N 117°17′44″W / 42.50861°N 117.29556°W / 42.50861; -117.29556 (Dry Creek (source))[155]5,000 ft
1,524 m		Source near Five Points, mouth near Burns Junction
Nestucca River Pacific Ocean53 mi
85 km[156] 		370 mi2
960 km2[157]		45°11′03″N 123°57′26″W / 45.18417°N 123.95722°W / 45.18417; -123.95722 (Nestucca River (mouth))0 ft
0 m		45°16′23″N 123°23′33″W / 45.27306°N 123.39250°W / 45.27306; -123.39250 (Nestucca River (source))[158] 2,246 ft
685 m 		Source in Northern Oregon Coast Range, mouth near Pacific City
Warm Springs River Deschutes River53 mi
85 km[11]		541 mi2
1,401 km2[70]		44°51′28″N 121°04′09″W / 44.85778°N 121.06917°W / 44.85778; -121.06917 (Warm Springs River (mouth))1,240 ft
378 m		44°57′39″N 121°47′21″W / 44.96083°N 121.78917°W / 44.96083; -121.78917 (Warm Springs River (source))[159]4,023 ft
1,226 m		Source in Cascade Range, mouth near Kahneeta
North Fork Coquille River Coquille River53 mi
85 km[106]		154 mi2
399 km2[106]		43°04′49″N 124°08′29″W / 43.08028°N 124.14139°W / 43.08028; -124.14139 (North Fork Coquille River (mouth))13 ft
4 m		43°16′54″N 123°51′14″W / 43.28167°N 123.85389°W / 43.28167; -123.85389 (North Fork Coquille River (source))[160]1,647 ft
502 m 		Source in central Coast Range, mouth near Myrtle Point
Chewaucan River Abert Lake53 mi
86 km[11]		651 mi2
1,686 km2[70]		42°31′21″N 120°14′59″W / 42.52250°N 120.24972°W / 42.52250; -120.24972 (Chewaucan River (mouth))4,258 ft
1,298 m		42°27′49″N 120°36′38″W / 42.46361°N 120.61056°W / 42.46361; -120.61056 (Chewaucan River (source))[161]5,151 ft
1,570 m		Source in Fremont National Forest, mouth at Abert Lake
Applegate River Rogue River51 mi
82 kmdagger[162][n 9]		767 mi2
1,990 km2[163] 		42°25′44″N 123°26′59″W / 42.42889°N 123.44972°W / 42.42889; -123.44972 (Applegate River (mouth))850 ft
259 m		41°58′23″N 123°11′08″W / 41.97306°N 123.18556°W / 41.97306; -123.18556 (Applegate River (source))[164] 2,534 ft
772 m 		Source in Siskiyou Mountains in California, mouth near Grants Pass
Trout Creek Deschutes River51 mi
82 km[11]		692 mi2
1,792 km2[165]		44°49′17″N 121°05′19″W / 44.82139°N 121.08861°W / 44.82139; -121.08861 (Trout Creek (mouth))1,283 ft
391 m		44°30′42″N 120°33′20″W / 44.51167°N 120.55556°W / 44.51167; -120.55556 (Trout Creek (source))[166]5,593 ft
1,705 m		Source in Ochoco Mountains, mouth at Jefferson–Wasco county line
Cow Creek Jordan Creek51 mi
82 kmdagger[11] [n 10]		330 mi2
855 km2[167]		42°56′51″N 117°20′38″W / 42.94750°N 117.34389°W / 42.94750; -117.34389 (Cow Creek (Jordan Creek; mouth))4,216 ft
1,285 m		43°04′23″N 116°50′23″W / 43.07306°N 116.83972°W / 43.07306; -116.83972 (Cow Creek (Jordan Creek; source))[168]7,048 ft
2,148 m		Source near De Lamar, Idaho, mouth at Danner
Crooked Creek Owyhee River51 mi
82 km[169]		1,340 mi2
3,500 km2[170] 		42°52′57″N 117°41′52″W / 42.88250°N 117.69778°W / 42.88250; -117.69778 (Crooked Creek (mouth))3,343 ft
1,019 m 		42°40′32″N 117°54′33″W / 42.67556°N 117.90917°W / 42.67556; -117.90917 (Crooked Creek (source))[171]3,921 ft
1,195 m		Source at Crooked Creek Spring, mouth near Rome
Minam River Wallowa River51 mi
82 km[11]		239 mi2
618 km2[172] 		45°37′17″N 117°43′14″W / 45.62139°N 117.72056°W / 45.62139; -117.72056 (Minam River (mouth))2,536 ft
773 m		45°10′07″N 117°21′28″W / 45.16861°N 117.35778°W / 45.16861; -117.35778 (Minam River (source))[173]7,684 ft
2,342 m		Source in the Eagle Cap Wilderness, mouth at Minam
Molalla River Willamette River50 mi
80 km[174]		877 mi2
2,270 km2[28] 		45°17′23″N 122°43′18″W / 45.28972°N 122.72167°W / 45.28972; -122.72167 (Molalla River (mouth)) 69 ft
21 m		44°54′12″N 122°16′01″W / 44.90333°N 122.26694°W / 44.90333; -122.26694 (Molalla River (source))[175]3,304 ft
1,007 m 		Source in Cascade Range, mouth near Canby
Walla Walla River Columbia River50 mi
80 kmdagger[176][n 11] 		1,758 mi2
4,453 km2[68] 		46°03′27″N 118°54′40″W / 46.05750°N 118.91111°W / 46.05750; -118.91111 (Walla Walla River (mouth)) 404 ft
123 m		45°53′54″N 118°18′28″W / 45.89833°N 118.30778°W / 45.89833; -118.30778 (Walla Walla River (source))[177]1,360 ft
410 m 		Source near Milton-Freewater, mouth near Wallula, Washington
A panorama of Portland, with many buildings on either side of the Willamette River, with a number of bridges crossing it
The Willamette River (10th longest) runs through the center of Portland, Oregon.

Map

Applegate River Bully Creek Burnt River Butter Creek Calapooia River Chetco River Chewaucan River Clackamas River Columbia River Cow Creek Cow Creek Crooked Creek Crooked River Deschutes River Donner und Blitzen River Dry Creek Dry River Fifteenmile Creek Grande Ronde River Illinois River Imnaha River John Day River Jordan Creek Klamath River Little Deschutes River Long Tom River Lost River Luckiamute River Malheur River McKenzie River Middle Fork John Day River Middle Fork Willamette River Minam River Molalla River Nehalem River Nestucca River North Fork Coquille River North Fork John Day River North Fork Malheur River North Santiam River North Umpqua River Owyhee River Powder River Pudding River Rattlesnake Creek Rock Creek Rock Creek Rogue River Sandy River Siletz River Silver Creek Silvies River Siuslaw River Smith River Snake River South Fork Coquille River South Fork Crooked River South Fork John Day River South Santiam River South Umpqua River South Yamhill River Sprague River Succor Creek Sycan River Trout Creek Tualatin River Umatilla River Umpqua River Walla Walla River Wallowa River Warm Springs River West Little Owyhee River Willamette River Williamson River Willow Creek Willow Creek Yaquina River Pacific Ocean OregonClickable map of all Oregon streams more than 50 miles (80 kilometers) long
Image map of all Oregon streams more than 50 miles (80 kilometers) long. Each label is wikilinked to an article. Click on the small rectangles to the right of the caption for a larger map.

See also

Notes and references

Notes
  1. ↑ Only 309 miles (497 km) of the Columbia River flow through Oregon.[8]
  2. ↑ Only 233 miles (375 km) of the Snake River flow through Oregon.[8]
  3. ↑ Only 186 miles (299 km) of the Owyhee River flow through Oregon.[13]
  4. ↑ Only 79 miles (127 km) of the Klamath River flow through Oregon. Calculated by subtracting the river mileage (208) at the Oregon–California border from the total length (287).[8]
  5. ↑ Only about 144 miles (232 km) of the Grande Ronde River flow through Oregon. The river leaves Oregon and enters Washington at about river mile 39, reenters Oregon at river mile 38, and flows back into Washington at river mile 37. The distance within Oregon is the total length, 182 miles (293 km), minus the distance 38 miles (61 km) in Washington.[30]
  6. ↑ Only 52 miles (84 km) of Jordan Creek flow through Oregon. The creek enters Oregon at about river mile 52.[11]
  7. ↑ Only 39 miles (63 km) of Succor Creek flow through Oregon. The creek enters Oregon at about river mile 44 and leaves it at about river mile 5.[11]
  8. ↑ Only about 46 miles (74 km) of the Lost River flow through Oregon. The river enters Oregon at about river mile 48 and leaves it at about river mile 2.[119]
  9. ↑ About 50 miles (80 km) of the Applegate River flow through Oregon. This is the sum of the 46 miles (74 km) marked on topo maps plus the remaining distance to the California border, measured by map scale and ruler.[162]
  10. ↑ Only 36 miles (58 km) of Cow Creek flow through Oregon. The creek enters Oregon at about river mile 36.[11]
  11. ↑ Only about 10 miles (16 km) of the Walla Walla River flow through Oregon. The river leaves the state and enters Washington at about river mile 40.[176]
References
  1. 1 2 3 Loy, et al., pp. 162–169
  2. ↑ United States Geological Survey. "United States Geological Survey Topographic Map". TopoQuest. Retrieved August 19, 2010.
  3. ↑ Oregon Atlas & Gazetteer. Freeport, Maine: Delorme Mapping. 1991. ISBN 978-0-89933-235-2.
  4. 1 2 Based on information in United States Geological Survey maps published on the Internet by TopoQuest, the Oregon Atlas, and the Oregon Atlas & Gazetteer. Locations are in Oregon except as noted.
  5. 1 2 3 The mouth coordinates, mouth elevation, and source coordinates are from the Geographic Names Information System (United States Geological Survey) listing for each river except for the source coordinates of the Columbia River, which are from the Canadian Geographical Names Data Base.
  6. ↑ Derived from Google Earth search using Geographic Names Information System (GNIS) source coordinates.
  7. 1 2 3 4 5 Kammerer, J.C. (May 1990). "Largest Rivers in the United States". United States Geological Survey. Retrieved August 5, 2010.
  8. 1 2 3 "Oregon's Publicly-Owned Waterways". Oregon Department of State Lands. March 16, 2009. Retrieved September 20, 2010.
  9. ↑ "Columbia River". Geographic Names Information System. United States Geological Survey. November 28, 1980. Retrieved August 5, 2010.
  10. ↑ "Columbia Lake". Natural Resources Canada. Retrieved January 31, 2011.
  11. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 "National Hydrography Dataset". United States Geological Survey. Retrieved September 3, 2010.
  12. ↑ "Snake River". Geographic Names Information System (GNIS). United States Geological Survey. September 10, 1979. Retrieved August 6, 2010.
  13. ↑ "Owyhee River". Oregon Environmental Council. Retrieved September 20, 2010.
  14. ↑ Benke and Cushing, Chapter 13, p. 647
  15. ↑ "Owyhee River". Geographic Names Information System (GNIS). United States Geological Survey. November 28, 1980. Retrieved August 13, 2010.
  16. 1 2 Benke and Cushing, Chapter 12, p. 563
  17. ↑ "Klamath River". Geographic Names Information System. United States Geological Survey (USGS). January 19, 1981. Retrieved August 16, 2010.
  18. 1 2 3 4 5 6 "Bull Trout Recovery Plan: Columbia River/Klamath (2002), Chapter 9: John Day River" (PDF). United States Fish and Wildlife Service. pp. iv–3. Retrieved August 12, 2010.
  19. ↑ "John Day River". Bureau of Land Management. Retrieved August 11, 2010.
  20. ↑ "John Day River". Geographic Names Information System (GNIS). United States Geological Survey. November 28, 1980. Retrieved August 12, 2010.
  21. 1 2 3 4 "Bull Trout Recovery Plan: Columbia River/Klamath (2002), Chapter 7: Deschutes River" (PDF). United States Fish and Wildlife Service. pp. iv–4. Retrieved August 13, 2010.
  22. ↑ "Deschutes River". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved August 16, 2010.
  23. ↑ United States Geological Survey (USGS). "United States Geological Survey Topographic Map: Hamaker Butte, Oregon quad". TopoQuest. Retrieved August 8, 2010. The Hamaker, Oregon, quadrant map includes a river mile (RM) marker for RM 211 (river kilometer 346) near the confluence of the Rogue River with Mazama Creek. The remaining 4 miles (6 km) is an estimate based on map scale and ruler.
  24. ↑ Benke and Cushing, Chapter 12, p. 569
  25. ↑ "Rogue River". Geographic Names Information System (GNIS). United States Geological Survey. November 28, 1980. Retrieved August 8, 2010.
  26. 1 2 "Bull Trout Recovery Plan: Columbia River/Klamath (2002), Chapter 11: Malheur River" (PDF). United States Fish and Wildlife Service. p. 1. Retrieved August 12, 2010.
  27. ↑ "Malheur River". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved August 16, 2010.
  28. 1 2 3 4 5 6 7 "Tributaries". Willamette Riverkeeper. Retrieved August 9, 2011.
  29. ↑ "Willamette River". Geographic Names Information System (GNIS). United States Geological Survey. November 28, 1980. Retrieved August 6, 2010.
  30. ↑ United States Geological Survey (August 9, 2011). "United States Geological Survey Topographic Map" (Map). TopoQuest. Sunset Dynamics. Retrieved August 9, 2011.
  31. ↑ "Bull Trout Recovery Plan: Columbia River/Klamath (2002), Chapter 11: Grande Ronde River" (PDF). United States Fish and Wildlife Service. p. 5. Retrieved August 12, 2010.
  32. ↑ "Grande Ronde River". Geographic Names Information System. United States Geological Survey (USGS). September 10, 1979. Retrieved August 16, 2010.
  33. 1 2 "Bull Trout Recovery Plan: Columbia River/Klamath (2002), Chapter 13: Hells Canyon" (PDF). United States Fish and Wildlife Service. p. 2. Retrieved August 13, 2010.
  34. ↑ "Powder River". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved August 16, 2010.
  35. ↑ United States Geological Survey (USGS). "United States Geological Survey Topographic Map". TopoQuest. Retrieved August 18, 2010. Map quadrants show river mileage from mouth to source.
  36. ↑ "Crooked River". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved August 16, 2010.
  37. ↑ Length derived by subtracting the main stem length of 187 miles (301 km) from the United States Geological Survey figure of 309 miles (497 km) for the main stem plus the Middle Fork
  38. ↑ "Middle Fork Willamette River". Geographic Names Information System (GNIS). United States Geological Survey. November 28, 1980. Retrieved August 9, 2010.
  39. 1 2 Johnson, Jill; Maser, Joseph (ed.). "Nehalem River Watershed Assessment 1.0 Introduction". Environmental Sciences and Resources Department, Portland State University. Retrieved August 16, 2010. Cite uses deprecated parameter |coauthors= (help)
  40. ↑ "Nehalem River". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved August 16, 2010.
  41. ↑ "North Fork John Day River". Geographic Names Information System (GNIS). United States Geological Survey (USGS). November 28, 1980. Retrieved August 15, 2010.
  42. ↑ United States Geological Survey (USGS). "United States Geological Survey Topographic Map". TopoQuest. Retrieved August 12, 2010. The map quadrants include river mile markers from mouth to source.
  43. ↑ Benke and Cushing, Chapter 12, p. 585
  44. ↑ "Umpqua River". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved August 16, 2010.
  45. ↑ United States Geological Survey (USGS). "United States Geological Survey Topographic Map". TopoQuest. Retrieved August 17, 2010. Map quadrangles show river mileage from mouth to source.
  46. ↑ Ame, John (2007). "Siuslaw Watershed". Oregon State University. Retrieved October 17, 2010.
  47. ↑ "Siuslaw River". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved August 16, 2010.
  48. 1 2 "Summary of Environmental Information on the Umpqua River Basin". National Oceanic and Atmospheric Administration. Archived from the original on January 17, 2013. Retrieved August 16, 2010.
  49. ↑ "North Umpqua – 17100301: 8-Digit Hydrologic Unit Profile" (PDF). National Resources Conservation Service, United States Department of Agriculture. May 2006. Retrieved August 17, 2010.
  50. ↑ "North Umpqua River". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved August 16, 2010.
  51. ↑ "South Umpqua – 17100302: 8-Digit Hydrologic Unit Profile" (PDF). National Resources Conservation Service, United States Department of Agriculture. May 2006. Retrieved August 16, 2010.
  52. ↑ "South Umpqua River". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved August 16, 2010.
  53. ↑ "Jordan – 17050108, 8 Digit Hydrologic Unit Profile" (PDF). National Resources Conservation Service. p. 2. Retrieved August 28, 2010.
  54. ↑ "Jordan Creek". Geographic Names Information System. United States Geological Survey. November 28, 1980. Retrieved August 28, 2010.
  55. ↑ "Burnt River". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved August 16, 2010.
  56. ↑ Sheehan, p. 290
  57. ↑ "Silvies – 17120002 8-Digit Hydrologic Unit Profile" (PDF). Natural Resources Conservation Service (NRCS). 2006. p. 1. Retrieved August 14, 2010.
  58. ↑ "Silvies River". Geographic Names Information System (GNIS). United States Geological Survey (USGS). November 28, 1980. Retrieved August 14, 2010.
  59. 1 2 "About the Watershed". North Santiam Watershed Council. Archived from the original on March 10, 2012. Retrieved August 9, 2010.
  60. ↑ "North Santiam River". Geographic Names Information System (GNIS). United States Geological Survey. November 28, 1980. Retrieved August 8, 2010.
  61. ↑ "Decision Notice and Finding of No Significant Impact (FONSI): Big Marsh Creek and Little Deschutes River Wild and Scenic River Plans". United States Forest Service. 2001. Archived from the original (PDF) on October 18, 2012. Retrieved August 26, 2010.
  62. ↑ "Little Deschutes River". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved August 16, 2010.
  63. ↑ United States Geological Survey (USGS). "United States Geological Survey Topographic Map". TopoQuest. Retrieved August 14, 2010. The maps include river mile markers for the lower 88 miles (142 km) of the river. The remaining distance is an estimate based on map scale and ruler.
  64. ↑ "Smith River Watershed". Smith River Watershed Council. Retrieved August 14, 2010.
  65. ↑ "Smith River". Geographic Names Information System (GNIS). United States Geological Survey (USGS). November 28, 1980. Retrieved August 14, 2010.
  66. ↑ "Watershed Facts". McKenzie Watershed Council. Retrieved August 8, 2010.
  67. ↑ "McKenzie River". Geographic Names Information System (GNIS). United States Geological Survey. November 28, 1980. Retrieved August 7, 2010.
  68. 1 2 3 "Bull Trout Recovery Plan: Columbia River/Klamath (2002), Chapter 10: Umatilla–Walla Walla" (PDF). United States Fish and Wildlife Service. pp. 2–4. Retrieved August 12, 2010.
  69. ↑ "Umatilla River". Geographic Names Information System (GNIS). United States Geological Survey (USGS). November 28, 1980. Retrieved August 14, 2010.
  70. 1 2 3 4 5 6 7 8 "Watershed Boundary Dataset". USDA, NRCS, National Cartography and Geospatial Center. Retrieved September 4, 2010. ArcExplorer GIS data viewer.
  71. ↑ "Dry River". Geographic Names Information System. United States Geological Survey. November 28, 1980. Retrieved September 3, 2010.
  72. ↑ Harney County Watershed Council (May 2000). "Silver Creek Subbasin Assessment" (PDF). Oregon State University. Retrieved August 24, 2010.
  73. ↑ "Silver Creek". Geographic Names Information System. United States Geological Survey. November 28, 1980. Retrieved August 5, 2010.
  74. 1 2 McDowell, P.F.; O'Connor, J.E.; Lind, P. (2005). "Sprague River geomorphology studies, Klamath Basin, Oregon (abstract #H31H-06)". The Smithsonian/NASA Astrophysics Data System (Smithsonian Astrophysical Observatory). Bibcode:2005AGUFM.H31H..06M. Retrieved April 11, 2011.
  75. ↑ "Sprague River". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved August 16, 2010.
  76. ↑ Taylor, Barbara (1999). "Indian Use" (PDF). Salmon and Steelhead Runs and Related Events of the Clackamas River Basin: A Historical Perspective. Portland General Electric. p. 5. Archived from the original (PDF) on March 11, 2006. Retrieved August 6, 2010.
  77. ↑ "Clackamas River, Oregon". Geographic Names Information System. United States Geological Survey. 1980. Retrieved August 7, 2010.
  78. 1 2 Tualatin River Watershed Council. "Frequently Asked Questions". Tualatin River Watershed Council. Archived from the original on July 17, 2012. Retrieved August 6, 2010.
  79. ↑ "Tualatin River". Geographic Names Information System (GNIS). United States Geological Survey. November 28, 1980. Retrieved August 6, 2010.
  80. ↑ "Rock Creek". Geographic Names Information System (GNIS). United States Geological Survey. November 28, 1980. Retrieved September 3, 2010.
  81. 1 2 The Willow Creek Local Advisory Committee (March 5, 2008). "Willow Creek Agricultural Water Quality Management Area Plan" (PDF). Oregon Department of Agriculture. p. 11. Retrieved August 9, 2011.
  82. ↑ "Willow Creek". Geographic Names Information System. United States Geological Survey. November 28, 1980. Retrieved August 23, 2010.
  83. ↑ "South Fork Crooked – 17070303 8-Digit Hydrologic Unit Profile" (PDF). National Resources Conservation Service (NRCS). May 2005. Retrieved September 3, 2010.
  84. ↑ "South Fork Crooked River". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved September 3, 2010.
  85. ↑ "Middle Fork John Day River". Geographic Names Information System. United States Geological Survey. November 28, 1980. Retrieved August 12, 2010.
  86. ↑ United States Geological Survey (USGS). "United States Geological Survey Topographic Map". TopoQuest. Retrieved August 24, 2010. The maps include river mile markers for the lower 73 miles (117 km) of the river. The remaining distance is an estimate based on map scale and ruler.
  87. ↑ "USGS Gage #14310000 on Cow Creek near Riddle, Oregon –– Water-Data Report 2009" (PDF). National Water Information System. United States Geological Survey. 2009. Retrieved August 23, 2010.
  88. ↑ "Cow Creek". Geographic Names Information System (GNIS). United States Geological Survey (USGS). November 28, 1980. Retrieved August 18, 2010.
  89. ↑ "Lower Sycan Watershed Analysis" (PDF). United States Forest Service. 2005. p. 2. Retrieved August 20, 2010.
  90. ↑ "Sycan River". Geographic Names Information System (GNIS). United States Geological Survey (USGS). November 28, 1980. Retrieved August 13, 2010.
  91. ↑ "Imnaha River – 17060102: 8-Digit Hydrologic Unit Profile" (PDF). National Resources Conservation Service, United States Department of Agriculture. March 2006. Retrieved August 12, 2010.
  92. ↑ "Imnaha River". Geographic Names Information System (GNIS). United States Geological Survey. November 28, 1980. Retrieved June 29, 2009.
  93. ↑ "Calapooia River". Geographic Names Information System (GNIS). United States Geological Survey. November 28, 1980. Retrieved August 7, 2010.
  94. ↑ Sheehan 2005, pp. 298–99.
  95. ↑ Risley, John C.; Laenen, Antonius (1999). "Upper Klamath Lake Basin Nutrient-Loading Study—Assessment of Historic flows in the Williamson and Sprague Rivers". United States Geological Survey (USGS). Retrieved August 14, 2010.
  96. ↑ "Williamson River". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved August 16, 2010.
  97. ↑ "Mid Snake River/Succor Creek Watershed" (PDF). Idaho Department of Environmental Quality. June 2005. p. 63. Archived from the original (PDF) on November 29, 2010. Retrieved August 31, 2010.
  98. ↑ "USGS 13173500 Succor Creek At Mouth Nr Homedale ID". United States Geological Survey. Retrieved August 31, 2010.
  99. ↑ "Succor Creek". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved August 31, 2010.
  100. ↑ United States Geological Survey (USGS). "United States Geological Survey Topographic Map". TopoQuest. Retrieved August 18, 2010. Map quadrants show river mileage from mouth to source.
  101. ↑ Ame, John (2007). "Siletz Watershed". Oregon State University. Retrieved October 17, 2010.
  102. ↑ "Siletz River". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved August 16, 2010.
  103. ↑ United States Geological Survey. "United States Geological Survey Topographic Map". TopoQuest. Retrieved August 7, 2010. The map quadrants include river-mile markers for the stream's entire length.
  104. ↑ "Watershed Issues". South Santiam Watershed Council. Retrieved August 9, 2010.
  105. ↑ "South Santiam River". Geographic Names Information System (GNIS). United States Geological Survey. November 28, 1980. Retrieved August 7, 2010.
  106. 1 2 3 4 "Introduction to the Coquille Watershed". Coquille Watershed Association. Retrieved August 25, 2010.
  107. ↑ "South Fork Coquille River". Geographic Names Information System (GNIS). United States Geological Survey. November 28, 1980. Retrieved August 25, 2010.
  108. ↑ "West Little Owyhee River". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved August 31, 2010.
  109. ↑ United States Geological Survey. "United States Geological Survey Topographic Map". TopoQuest. The map quadrants include river-mile (RM) markers to RM 59 (river kilometer 95). The remaining distance is an estimate based on map scale and ruler.
  110. ↑ "Organizational Overview". Pudding River Watershed Council. Retrieved August 6, 2010.
  111. ↑ "Pudding River". Geographic Names Information System (GNIS). United States Geological Survey. November 28, 1980. Retrieved August 10, 2010.
  112. ↑ United States Geological Survey. "United States Geological Survey Topographic Map". TopoQuest. Retrieved September 2, 2010. The map quadrants include river-mile (RM) markers to RM 52 (river kilometer 84). The remaining distance is an estimate based on map scale and ruler.
  113. ↑ "Luckiamute Watershed". Luckiamute Watershed Council. Archived from the original on September 8, 2015. Retrieved October 4, 2015.
  114. ↑ "Luckiamute River". Geographic Names Information System (GNIS). United States Geological Survey. November 28, 1980. Retrieved September 2, 2010.
  115. ↑ Bully Creek Watershed Coalition; et al. (1997). "Bully Creek Watershed Assessment and Strategy" (PDF). Oregon Department of Fish and Wildlife. p. 9. Retrieved October 3, 2015.
  116. ↑ "Bully Creek". Geographic Names Information System. United States Geological Survey. November 28, 1980. Retrieved August 27, 2010.
  117. ↑ Cole, Michael B.; Blaha, Rich J.; Lemke, Jena L.; ABR, Inc., Environmental Research & Services (November 2003). "Upper South Fork of the John Day River Watershed Assessment" (PDF). Oregon Department of Fish and Wildlife. Retrieved August 21, 2010. Cite uses deprecated parameter |coauthors= (help)
  118. ↑ "South Fork John Day River". Geographic Names Information System (GNIS). United States Geological Survey (USGS). November 28, 1980. Retrieved August 12, 2010.
  119. 1 2 United States Geological Survey (USGS). "United States Geological Survey Topographic Map". TopoQuest. Retrieved August 17, 2010. Map quadrants show river mileage from mouth to source.
  120. ↑ "Lost River Subbasin Agricultural Water Quality Management Area Plan" (PDF). Oregon Department of Agriculture. 2006. p. 12. Archived from the original (PDF) on October 12, 2012. Retrieved August 9, 2011.
  121. ↑ "Lost River". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved August 16, 2010.
  122. ↑ "Environmental Assessment for the Blitzen River Fish Passage Improvement Project" (PDF). U.S. Fish and Wildlife Service. March 2010. pp. 15–16. Retrieved August 14, 2010.
  123. ↑ "Donner und Blitzen – 17120003 8-Digit Hydrologic Unit Profile" (PDF). National Resources Conservation Service (NRCS). 2006. Retrieved August 14, 2010.
  124. ↑ "Donner und Blitzen River". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved August 16, 2010.
  125. ↑ United States Geological Survey. "United States Geological Survey Topographic Map". TopoQuest. Retrieved August 8, 2010. The map quadrants include river mile (RM) markers from the mouth to RM 55 (river kilometer 89), upstream of Grand Ronde, Oregon. The remaining distance is an estimate based on map scale and ruler.
  126. ↑ "Map 1: The Yamhill River Basin & the Chehalem Valley" (PDF). Yamhill Basin Council. 2002. Archived from the original (PDF) on December 26, 2004. Retrieved August 9, 2011. The total is the sum of five subwatersheds: Upper Yamhill, Mill Creek, Salt Creek, Lower South Yamhill/Deer Creek, and Willamina Creek.
  127. ↑ "South Yamhill River". Geographic Names Information System. United States Geological Survey. November 28, 1980. Retrieved August 9, 2010.
  128. ↑ Fenton, Jason. ""Use of Radio Telemetry to Document Movements of Bull Trout in the North Fork Malheur River, Oregon 2002" in Evaluation of the Life History of Native Salmonids in the Malheur River Basin" (PDF). Bonneville Power Administration. p. 5. Retrieved August 26, 2010.
  129. ↑ Malheur Watershed Council; Burns Paiute Tribe (May 2004). "Malheur River Subbasin Assessment and Management Plan For Fish and Wildlife Mitigation" (PDF). Northwest Power and Conservation Council. Retrieved August 26, 2010.
  130. ↑ "North Fork Malheur River". Geographic Names Information System. United States Geological Survey. November 28, 1980. Retrieved August 26, 2010.
  131. 1 2 Ame, John (2007). "Yaquina Watershed". Oregon State University. Retrieved October 17, 2010.
  132. ↑ "Yaquina River". Geographic Names Information System (GNIS). United States Geological Survey (USGS). November 28, 1980. Retrieved August 14, 2010.
  133. 1 2 Maudlin, Michael (December 2000). "Umatilla Sub-Basin Assessment" (PDF). Washington State University. Retrieved August 24, 2010.
  134. ↑ "Butter Creek". Geographic Names Information System (GNIS). United States Geological Survey (USGS). November 28, 1980. Retrieved August 24, 2010.
  135. ↑ "Rattlesnake Creek". Geographic Names Information System (GNIS). United States Geological Survey (USGS). November 28, 1980. Retrieved September 3, 2010.
  136. ↑ "Malheur River Basin Agricultural Water Quality Management Area Plan". Oregon Department of Agriculture. February 15, 2001. p. 9. Archived from the original (PDF) on September 5, 2010. Retrieved March 5, 2011. Reference states that Willow Creek is dammed 41 miles (66 km) from its mouth. The remaining distance is an estimate based on map scale and ruler.
  137. ↑ Malheur Watershed Council; Burns Paiute Tribe (May 2004). "Malheur River Subbasin Assessment and Management Plan For Fish and Wildlife Mitigation" (PDF). Northwest Power and Conservation Council. p. 14. Retrieved March 5, 2011.
  138. ↑ "Willow Creek". Geographic Names Information System (GNIS). United States Geological Survey (USGS). November 28, 1980. Retrieved August 24, 2010.
  139. 1 2 Maguire, Mike (June 2001). "Chetco River Watershed Assessment" (PDF). South Coast Watershed Council. Retrieved August 17, 2010.
  140. ↑ "Chetco River". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved August 16, 2010.
  141. ↑ "Illinois River, Oregon". National Wild and Scenic Rivers. Archived from the original on June 10, 2010. Retrieved September 1, 2010. The distance between the source and the upstream boundary of the Wild and Scenic section, which begins at river mile (RM) 50.4 (river kilometer 81.1) and ends at the mouth, is an estimate based on map scale and ruler.
  142. ↑ Hickman, O. Eugene. "Potential Natural (Historic?) Vegetation of the Central Illinois River Valley". Oregon Department of Fish and Wildlife. Retrieved May 22, 2009. The document is Appendix E of the Illinois Appendices in zipped PDF format.
  143. ↑ "Illinois River". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved August 16, 2010.
  144. ↑ "Rock Creek". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved September 3, 2010.
  145. ↑ United States Geological Survey. "United States Geological Survey Topographic Map". TopoQuest. Retrieved August 18, 2010. The map quadrants include river mile (RM) markers from the mouth to RM 50 (river kilometer 74.5). The remaining distance is an estimate based on map scale and ruler.
  146. ↑ "Wallowa River—17060105: 8-Digit Hydrologic Unit Profile" (PDF). National Resources Conservation Service, United States Department of Agriculture. March 2006. Retrieved August 20, 2010.
  147. ↑ "Wallowa River". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved August 16, 2010.
  148. 1 2 "Bull Trout Recovery Plan: Columbia River/Klamath (2002), Chapter 6: Hood River" (PDF). United States Fish and Wildlife Service. p. 4. Retrieved August 13, 2010.
  149. ↑ "Sandy River". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved August 16, 2010.
  150. ↑ "Long Tom Subbasin Fish Management Plan" (PDF). Oregon Department of Fish and Wildlife. March 1992. Retrieved September 3, 2010.
  151. ↑ "Long Tom Watershed Assessment" (PDF). Long Tom Watershed Council. January 2000. Retrieved September 3, 2010.
  152. ↑ "Long Tom River". Geographic Names Information System (GNIS). United States Geological Survey (USGS). November 28, 1980. Retrieved September 3, 2010.
  153. ↑ "Fifteenmile Creek Basin Aquatic Habitat Restoration Strategy" (PDF). United States Forest Service. May 2010. Retrieved September 3, 2010.
  154. ↑ "Fifteenmile Creek". Geographic Names Information System (GNIS). United States Geological Survey (USGS). November 28, 1980. Retrieved September 3, 2010.
  155. ↑ "Dry Creek". Geographic Names Information System (GNIS). United States Geological Survey. November 28, 1980. Retrieved March 13, 2011.
  156. ↑ United States Geological Survey (USGS). "United States Geological Survey Topographic Map". TopoQuest. Retrieved August 17, 2010. Map quadrangles show river mileage from the mouth to 49.7 miles (80.0 km). The remaining distance is an estimate based on map scale and ruler.
  157. ↑ "Nestucca Bay Watershed TMDLs and Water Quality Management Plan" (PDF). Oregon Department of Environmental Quality. Retrieved August 20, 2010. Includes the watershed of the Little Nestucca River, which is a tributary of Nestucca Bay but not the Nestucca River main stem.
  158. ↑ "Nestucca River". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved August 16, 2010.
  159. ↑ "Warm Springs River". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved September 3, 2010.
  160. ↑ "North Fork Coquille River". Geographic Names Information System (GNIS). United States Geological Survey. November 28, 1980. Retrieved August 25, 2010.
  161. ↑ "Chewaucan River". Geographic Names Information System (GNIS). United States Geological Survey. November 28, 1980. Retrieved September 3, 2010.
  162. 1 2 "United States Geological Survey Topographic Map". Geographic Names Information System. TopoQuest. Retrieved August 17, 2010. Map quadrants show river mileage from the mouth to river mile (RM) 46 or river kilometer (RK) 74 near the intake for Applegate Dam. The remaining distance is an estimate based on map scale and ruler.
  163. ↑ "Little Applegate River Watershed Analysis" (PDF). Bureau of Land Management. May 1995. p. 1. Retrieved August 18, 2010.
  164. ↑ "Applegate River". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved August 16, 2010.
  165. ↑ "Trout Creek Watershed Assessment" (PDF). Oregon Department of Fish and Wildlife. August 2002. Retrieved September 3, 2010.
  166. ↑ "Trout Creek". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved September 3, 2010.
  167. ↑ "USGS 13180000 Cow Creek At Danner,Oreg". United States Geological Survey. Retrieved September 3, 2010.
  168. ↑ "Cow Creek". Geographic Names Information System. United States Geological Survey (USGS). November 28, 1980. Retrieved September 3, 2010.
  169. ↑ "Vmap0". GIS-Lab. Retrieved September 3, 2010.
  170. ↑ "Oregon Hydrologic Units". United States Geological Survey. 1996. Retrieved September 3, 2010.
  171. ↑ "Crooked Creek". Geographic Names Information System (GNIS). United States Geological Survey. November 28, 1980. Retrieved September 3, 2010.
  172. ↑ "Minam River Spring Chinook Population" (PDF). Northwest Fisheries Science Center of the National Oceanic and Atmospheric Administration. p. 2. Retrieved August 17, 2010.
  173. ↑ "Minam River". Geographic Names Information System (GNIS). United States Geological Survey (USGS). November 28, 1980. Retrieved August 16, 2010.
  174. ↑ United States Geological Survey. "United States Geological Survey Topographic Map". TopoQuest. Retrieved August 9, 2010. The map quadrants include river mile (RM) markers from the mouth to RM 46.3 (river kilometer 74.5). The remaining distance is an estimate based on map scale and ruler.
  175. ↑ "Molalla River". Geographic Names Information System (GNIS). United States Geological Survey. November 28, 1980. Retrieved August 9, 2010.
  176. 1 2 United States Geological Survey (USGS). "United States Geological Survey Topographic Map". TopoQuest. Retrieved August 18, 2010. The maps include river mile markers for the lower 46 miles (74 km) of the river. The remaining distance is an estimate based on map scale and ruler.
  177. ↑ "Walla Walla River". Geographic Names Information System (GNIS). United States Geological Survey (USGS). November 28, 1980. Retrieved August 14, 2010.

Works cited

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