The Bruneau River is a 153-mile-long (246 km) tributary of the Snake River, in the U.S. states of Idaho and Nevada. It runs through a narrow canyon cut into ancient lava flows in southwestern Idaho. The Bruneau Canyon, which is up to 1,200 feet (370 m) deep and 40 miles (64 km) long, features rapids and hot springs, making it a popular whitewater trip.
The Salmon River is located in Idaho in the northwestern United States. The Salmon is also known as "The River of No Return". It flows for 425 miles (685 km) through central Idaho, draining a rugged, thinly populated watershed of 14,000 square miles (36,000 km2) and dropping more than 7,000 feet (2,100 m) between its headwaters, near Galena Summit above the Sawtooth Valley in the Sawtooth National Recreation Area, and its confluence with the Snake River. Measured at White Bird, its average discharge is 11,060 cubic feet per second. It is one of the largest rivers in the continental United States without a single dam on its mainstem.
The Calapooia River is an 80-mile (130 km) tributary of the Willamette River in the U.S. state of Oregon.
The Owyhee River is a tributary of the Snake River located in northern Nevada, southwestern Idaho and southeastern Oregon in the United States. It is 280 miles (450 km) long. The river's drainage basin is 11,049 square miles (28,620 km2) in area, one of the largest subbasins of the Columbia Basin. The mean annual discharge is 995 cubic feet per second (28.2 m3/s), with a maximum of 50,000 cu ft/s (1,400 m3/s) recorded in 1993 and a minimum of 42 cu ft/s (1.2 m3/s) in 1954.
The South Santiam River is a tributary of the Santiam River, about 69 miles (111 km) long, in western Oregon in the United States. It drains an area of the Cascade Range into the Willamette Valley east of Corvallis.
The Imnaha River is a 73.3-mile-long (118.0 km) tributary of the Snake River in the U.S. state of Oregon. Flowing generally east near the headwaters and then north through Wallowa County, the entire river is designated Wild and Scenic. It follows a geologic fault to the Snake River, and in addition to land in the Wallowa–Whitman National Forest and private land, its corridor includes parts of three special management areas: the Eagle Cap Wilderness, Hells Canyon National Recreation Area, and Hells Canyon Scenic Byway. The Imnaha flows by the unincorporated community of Imnaha, the only settlement along its course, and enters the Snake River roughly 4 miles (6 km) from the larger river's confluence with the Salmon River of Idaho and 192 miles (309 km) from its confluence with the Columbia River.
The Umatilla River is an 89-mile (143 km) tributary of the Columbia River in northern Umatilla County, Oregon, United States. Draining a basin of 2,450 square miles (6,300 km2), it enters the Columbia near the city of Umatilla in the northeastern part of the state. In downstream order, beginning at the headwaters, major tributaries of the Umatilla River are the North Fork Umatilla River and the South Fork Umatilla River, then Meacham, McKay, Birch, and Butter creeks.
The Burnt River is a 98-mile-long (158 km) tributary of the Snake River in eastern Oregon, United States. It enters the Snake near Huntington, Oregon, at a point upstream of the Powder River and downstream of the Malheur River, slightly more than 327 miles (526 km) from the Snake's confluence with the Columbia River. Draining 1,090 square miles (2,800 km2), it flows predominantly west to east.
Succor Creek is a 69.4-mile-long (111.7 km) tributary of the Snake River in the U.S. states of Idaho and Oregon. The creek begins in the Owyhee Mountains in Owyhee County, Idaho. After flowing for about 23 miles (37 km) in Idaho, Succor Creek enters Malheur County, Oregon, where it flows for 39 miles (63 km) before re-entering Idaho for its final 5 miles (8.0 km). It joins the Snake near Homedale, about 413 river miles (665 km) from the larger river's confluence with the Columbia River.
Catherine Creek is a 32.4-mile-long (52.1 km) creek in northeastern Oregon, United States. A tributary of the Grande Ronde River, it is the second-longest stream in the Grande Ronde Valley. Originating in the foothills of the Wallowa Mountains, it flows generally northwest through Catherine Creek State Park and the city of Union before joining the river.
Jordan Creek is a 99-mile (159 km) tributary of the Owyhee River in the northwestern United States. It flows generally west from near Silver City, Idaho, in the Owyhee Mountains to near Rome in the Oregon High Desert. Major tributaries are Big Boulder, Soda, Louse, Spring, Rock, Meadow, Combination, and Louisa creeks in Idaho and Cow Creek in Oregon. The creek is named for Michael M. Jordan, who led a party that discovered gold along the creek in 1863.
West Little Owyhee River is a 63.1-mile-long (101.5 km) tributary of the Owyhee River in the U.S. state of Oregon. The source of the river is at an elevation of 6,508 feet (1,984 m) near McDermitt, while the mouth is at an elevation of 4,373 feet (1,333 m) in the Owyhee Desert. West Little Owyhee River has a 310-square-mile (800 km2) watershed.
The North Fork Payette River is a river in western Idaho in the United States. It flows about 113 miles (182 km) southwards from the Salmon River Mountains to near Banks, where it empties into the Payette River, a tributary of the Snake River. It drains a watershed of 912 square miles (2,360 km2), consisting of mountains and forests, and valleys filled with large lakes and wetlands.
Mosby Creek is a 21-mile (34 km) tributary of the Row River in Lane County, in the U.S. state of Oregon. It begins at the confluence of the east and west forks of the creek near the Calapooia Divide and the border with Douglas County. From its source it flows generally north-northwest to meet the river slightly east of Cottage Grove and about 4 miles (6 km) from the larger stream's confluence with the Coast Fork Willamette River.
The North Fork Owyhee River is a tributary, about 30 miles (48 km) long, of the Owyhee River in Malheur County, Oregon, and Owyhee County, Idaho, in the United States. It begins on the east flank of the Owyhee Mountains in Idaho and flows generally southwest to meet the main stem at Three Forks, Oregon, 161 miles (259 km) above the confluence of the larger river with the Snake River.
The South Fork Burnt River is a tributary of the Burnt River in Baker County in the U.S. state of Oregon. Its headwaters lie in the Monument Rock Wilderness and the Wallowa–Whitman National Forest of the Blue Mountains. It flows generally northeast for about to meet the main stem at Unity Reservoir, north of Unity. The river, about 12 miles (19 km) long, crosses under U.S. Route 26 about 3 miles (5 km) northwest of Unity.
The North Fork Umatilla River is a tributary of the Umatilla River in Union and Umatilla counties in the U.S. state of Oregon. Its headwaters lie in the Umatilla National Forest in the Blue Mountains of northeastern Oregon. It flows generally northwest to meet the South Fork Umatilla River near Graves Butte. Together the two forks form the main stem Umatilla.
The South Fork Umatilla River is a tributary of the Umatilla River in Umatilla County in the U.S. state of Oregon. Its headwaters lie in the Umatilla National Forest in the Blue Mountains of northeastern Oregon near Pileup Saddle and Black Mountain. The South Fork flows generally north between Goodman Ridge and Bobsled Ridge to meet the North Fork Umatilla River near Graves Butte. Together the forks form the main stem Umatilla.
The North Fork Smith River is a 34-mile (55 km) tributary of the Smith River in Douglas County in the U.S. state of Oregon. It begins in the Central Oregon Coast Range near Roman Nose Mountain and flows generally southwest to meet the larger river 16 miles (26 km) from its confluence with the Umpqua River at Reedsport. The entire course of the North Fork lies within the Siuslaw National Forest.
Horse Creek is a tributary of the McKenzie River in near the unincorporated community of McKenzie Bridge in Lane County in the U.S. state of Oregon. It begins in the Cascade Range in the Three Sisters Wilderness of the Willamette National Forest. Its headwaters are near the Deschutes County border and the Pacific Crest Trail. It flows generally northwest to meet the river about 65 miles (105 km) upstream of the McKenzie's confluence with the Willamette River.
