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 Cranberry River is a tributary of the Gauley River located in southeastern West Virginia in the United States. It is a part of the Mississippi River watershed, by way of the Gauley, Kanawha, and Ohio Rivers, draining an area of 74 square miles (192 km2).
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.
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.
Lost Creek is an unusual 3-mile (5 km) tributary of the McKenzie River in Lane County, in the U.S. state of Oregon. It is the lower section of a hydrogeological system, a losing stream, that begins at the base of Collier Glacier in the Cascade Range. This lower section rises from a spring complex north of Oregon Route 242 in the Cascade Range and flows generally northwest to meet the river near Belknap Springs. This is near the intersection of Route 242 with Oregon Route 126 and about 74 miles (119 km) upstream of the McKenzie's confluence with the Willamette River.
French Pete Creek is a tributary of the South Fork McKenzie River in Lane County, in the U.S. state of Oregon. It flows generally west through the Three Sisters Wilderness to the south end of Cougar Reservoir, about 11 miles (18 km) from the larger river's confluence with the McKenzie River. The creek has two named tributaries—Olallie Creek and, further downstream, Pat Creek—both of which enter from the right.
Roaring River is a tributary of the South Fork McKenzie River in Lane County in the U.S. state of Oregon. It begins along the west side of Roaring River Ridge in the Cascade Range and flows generally north through the Willamette National Forest to meet the larger stream about 22 miles (35 km) from its confluence with the McKenzie 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 North Fork Siuslaw River is a tributary of the Siuslaw River in Lane County in the United States state of Oregon. It is formed by the confluence of Sam Creek and West Branch in the Siuslaw National Forest of the Central Oregon Coast Range. The former community of Pawn was once at the juncture of the two creeks. From here, the river flows about 2 miles (3 km) southeast, then about 25 miles (40 km) southwest to meet the main stem 1.2 miles (1.9 km) east of Florence.
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 Little Minam River is a tributary of the Minam River in Union County in the U.S. state of Oregon. It begins at the base of Cartwheel Ridge in the Wallowa Mountains and flows generally north through the Wallowa–Whitman National Forest to meet the main stem river at the north end of Backbone Ridge.
The North Fork Smith River is 28-mile (45 km) tributary of the Smith River that begins in the U.S. state of Oregon and ends in the U.S. state of California. Arising near Chetco Peak in the Klamath Mountains, it flows generally south to meet the Middle Fork Smith River at Gasquet, California. The combined streams form the Smith River.
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.
Fall Creek is a 34-mile (55 km) tributary of the Middle Fork Willamette River in Lane County in the U.S. state of Oregon. Beginning in the Cascade Range, the creek flows generally west through the Willamette National Forest to enter the Middle Fork upstream of Jasper, southeast of Springfield and Eugene.
Fall Creek Lake is a reservoir in Lane County, in the U.S. state of Oregon. It is about 22 miles (35 km) southeast of Eugene on Fall Creek, immediately upstream from Unity Bridge, a covered bridge. The communities of Unity, at the bridge site, and Lowell, south of Unity, are near the lake. The unincorporated community of Jasper is further downstream, below the confluence of Fall Creek with the Middle Fork Willamette River.
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.
