The Clackamas River is an approximately 83-mile (134 km) tributary of the Willamette River in northwestern Oregon, in the United States. Draining an area of about 940 square miles (2,435 km2), the Clackamas flows through mostly forested and rugged mountainous terrain in its upper reaches, and passes agricultural and urban areas in its lower third. The river rises in eastern Marion County, about 55 miles (89 km) east-southeast of Salem. The headwaters are on the slopes of Olallie Butte in the Mount Hood National Forest, about 10 miles (16 km) north of Mount Jefferson, at an elevation of 4,909 feet (1,496 m) in the Cascade Range. The Clackamas flows briefly north and then flows northwest through the mountains, passing through North Fork Reservoir and Estacada. It then emerges from the mountains southeast of Portland. It joins the Willamette near Oregon City and forms the boundary between Oregon City and Gladstone.
The Elk River is in southwestern Oregon in the United States. About 29 miles (47 km) long, the river drains a remote 92-square-mile (240 km2) area of the Coast Range into the Pacific Ocean.
The Nestucca River flows for about 57 miles (92 km) through forests near the Pacific coast of northwest Oregon in the United States. It drains a timber-producing area of the Northern Oregon Coast Range west of Portland.
The Alsea River flows 48.5 miles (78.1 km) from Alsea, an unincorporated community in the coastal mountains of the U.S. state of Oregon, to the Pacific Ocean near the city of Waldport. It begins at the confluence of the North Fork Alsea River and the South Fork Alsea River and ends in Alsea Bay, a wide estuary at Waldport. The river flows generally west-northwest in a winding course through the mountains of southern Benton and Lincoln counties, passing near the unincorporated community of Tidewater and through the Siuslaw National Forest. Its drainage basin extends into Lane County, along the headwaters of the South Fork Alsea River.
The Salmon River is a 33.5-mile (53.9 km) river in the Cascade Range in the U.S. state of Oregon that drains part of southwestern Mount Hood. The entire length of the river is a protected National Wild and Scenic River. Several portions are in protected wilderness. It is affluent to the Sandy River, a tributary of the Columbia River.
The Crooked River is a tributary, 125 miles (201 km) long, of the Deschutes River in the U.S. state of Oregon. The river begins at the confluence of the South Fork Crooked River and Beaver Creek. Of the two tributaries, the South Fork Crooked River is the larger and is sometimes considered part of the Crooked River proper. A variant name of the South Fork Crooked River is simply "Crooked River". The Deschutes River flows north into 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.
The Wenaha River is a tributary of the Grande Ronde River, about 22 miles (35 km) long, in the U.S. state of Oregon. The river begins at the confluence of its north and south forks in the Blue Mountains and flows east through the Wenaha–Tucannon Wilderness to meet the larger river at the small settlement of Troy. A designated Wild and Scenic River for its entire length, the stream flows wholly within Wallowa County.
The South Fork Rogue River is a 25-mile (40 km) tributary of the Rogue River in the U.S. state of Oregon. Rising in the Sky Lakes Wilderness in the Cascade Range, it flows generally northeast through the Rogue River – Siskiyou National Forest to meet the Rogue River downstream of Prospect and slightly upstream of Lost Creek Lake.
The North Fork Malheur River is a 59-mile (95 km) tributary of the Malheur River in eastern Oregon in the United States. Rising in Big Cow Burn in the Blue Mountains, it flows generally south to join the larger river at Juntura. The upper 25.5 miles (41.0 km) of the river have been designated Wild and Scenic. This part of the river basin offers camping, hiking, and fishing opportunities in a remote forest setting. The lower river passes through Beulah Reservoir, which stores water for irrigation and has facilities for boaters.
The Little North Santiam River is a 27-mile (43 km) tributary of the North Santiam River in western Oregon in the United States. It drains 113 square miles (290 km2) of the Cascade Range on the eastern side of the Willamette Valley east of Salem.
The North Fork Alsea River is a 16-mile (26 km) tributary of the Alsea River in the U.S. state of Oregon. It begins at Klickitat Lake, fed by Klickitat and Lake creeks in the Central Oregon Coast Range, and flows generally south to near Alsea, where it joins the South Fork Alsea River to form the main stem. For most of its course, the North Fork winds through the Siuslaw National Forest in Lincoln County and then Benton County. It passes under Oregon Route 34 northeast of Alsea.
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.
Pawn was a historic unincorporated community in Lane County in the U.S. state of Oregon. It lay at the headwaters of the North Fork Siuslaw River, where Sam Creek and West Branch join to form the river in the Siuslaw National Forest of the Central Oregon Coast Range. Downstream is the unincorporated community of Minerva, and further downstream, near the mouth of the river on the Siuslaw River is the city of Florence.
Beaver Creek is a tributary of the Crooked River in the U.S. state of Oregon. It is formed by the confluence of its two forks in southeastern Crook County, a sparsely populated part of Central Oregon. North Fork Beaver Creek flows south and then west around Laughlin Table. South Fork Beaver Creek drains the slopes of Snow Mountain and Funny Butte in southwestern Grant County before joining the North Fork.
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.
Eagle Creek is a tributary, 41 miles (66 km) long, of the Powder River in the northeastern part of the U.S. state of Oregon. Beginning at Eagle Lake in the Wallowa Mountains, the creek flows generally southwest and then southeast to meet the river near the small city of Richland. The creek's headwaters are in the Eagle Cap Wilderness within the Wallowa–Whitman National Forest. The upper 28.9 miles (46.5 km) of the creek, from Eagle Lake to the national forest boundary at Skull Creek, are part of the National Wild and Scenic Rivers System.
Big Creek is a stream that enters the Pacific Ocean along the coast of Lane County in the U.S. state of Oregon. Beginning at Saddle Mountain Spring in the Central Oregon Coast Range, it flows generally west through the Siuslaw National Forest to the ocean north of Heceta Head. Near its mouth, it passes under Big Creek Bridge, which carries U.S. Route 101.
Deadwood Creek is a tributary of Lake Creek in the Siuslaw River basin in Lane County in the U.S. state of Oregon. Beginning near Taylor Butte in the Central Oregon Coast Range, it meanders generally southwest through the Siuslaw National Forest to meet the larger creek at the rural community of Deadwood. This is 5 miles (8 km) from Lake Creek's confluence with the river near Swisshome and 34 miles (55 km) by water from the Siuslaw River's mouth on the Pacific Ocean at Florence.
Lake Creek is a major tributary of the Siuslaw River in Lane County in the U.S. state of Oregon. On average, the 40-mile (64 km) long creek contributes about a third of the lower Siuslaw's water volume.
