The Molalla River is a 51-mile (82 km) tributary of the Willamette River in the northwestern part of Oregon in the United States. Flowing northwest from the Cascade Range through Table Rock Wilderness, it passes the city of Molalla before entering the larger river near Canby. The Molalla is the largest Willamette tributary unblocked by a dam.
The Umpqua River on the Pacific coast of Oregon in the United States is approximately 111 miles (179 km) long. One of the principal rivers of the Oregon Coast and known for bass and shad, the river drains an expansive network of valleys in the mountains west of the Cascade Range and south of the Willamette Valley, from which it is separated by the Calapooya Mountains. From its source northeast of Roseburg, the Umpqua flows northwest through the Oregon Coast Range and empties into the Pacific at Winchester Bay. The river and its tributaries flow almost entirely within Douglas County, which encompasses most of the watershed of the river from the Cascades to the coast. The "Hundred Valleys of the Umpqua" form the heart of the timber industry of southern Oregon, generally centered on Roseburg.
The Smith River is a 90-mile (140 km) tributary of the Umpqua River in the U.S. state of Oregon. It drains 352 square miles (910 km2) of the Central Oregon Coast Range between the watershed of the Umpqua to the south and the Siuslaw River to the north.
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 Middle Santiam River is a tributary of the South Santiam River, 38.5 miles (62.0 km) long, in western Oregon in the United States. It drains a remote area of the Cascade Range east of Sweet Home in the watershed of the Willamette River.
The Klickitat River is a tributary of the Columbia River, nearly 96 miles (154 km) long, in south-central Washington in the United States. It drains a rugged plateau area on the eastern side of the Cascade Range northeast of Portland, Oregon. In 1986, 10 miles (16 km) of the river were designated Wild and Scenic from the confluence with Wheeler Creek, near the town of Pitt, to the confluence with the Columbia River.
The Middle Fork Willamette River is one of several forks that unite to form the Willamette River in the western part of the U.S. state of Oregon. It is approximately 115 miles (185 km) long, draining an area of the Cascade Range southeast of Eugene, which is at the southern end of the Willamette Valley.
Fisher is an unincorporated community in rural Lincoln County, Oregon, United States. Fisher lies along Five Rivers Road, 9.2 miles (14.8 km) south of its intersection with Oregon Route 34. It is slightly north of the Lincoln–Lane county line in the Siuslaw National Forest. A stream called Five Rivers flows west through Fisher, about 12 miles (19 km) by water from the stream's mouth on the Alsea River. Route 34 runs along the Alsea River between Alsea and Waldport.
Blue River is a tributary of the McKenzie River in Linn and Lane counties in the U.S. state of Oregon. From its source at the confluence of Mann and Wolf creeks in the Cascade Range, it flows generally southwest to join the McKenzie near the community of Blue River. Saddle Dam and Blue River Dam block the river about 2 miles (3 km) from its mouth to form Blue River Reservoir, a multipurpose impoundment built in 1968 by the United States Army Corps of Engineers.
The Green River is a tributary of Five Rivers in the U.S. state of Oregon. It arises in the Siuslaw National Forest of the Central Oregon Coast Range and flows generally northeast to meet Five Rivers upstream of the rural community of Fisher. The confluence is about 15 miles (24 km) from the larger stream's confluence with the Alsea River. The Green River's named tributaries from source to mouth are the East Fork Green River and Ryan Creek.
The South Fork McKenzie River is a tributary, about 31 miles (50 km) long, of the McKenzie River in the U.S. state of Oregon. It begins at about 4,500 feet (1,400 m) above sea level near Mink Lake in the Three Sisters Wilderness of the Cascade Range. Flowing northwest within Lane County, it meets the McKenzie River about 60 miles (97 km) from the larger river's confluence with the Willamette River.
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 South Fork Malheur River is tributary of the Malheur River in a sparsely populated part of the U.S. state of Oregon. Arising southeast of the unincorporated community of New Princeton and slightly north of Oregon Route 78, it flows generally northeast to meet the Malheur near the unincorporated community of Riverside in Malheur County. The South Fork enters the larger river 96 miles (154 km) by water from its confluence with the Snake River.
Drift Creek is a tributary, about 18 miles (29 km) long, of Siletz Bay in the U.S. state of Oregon. The creek begins near Stott Mountain in the Central Oregon Coast Range in Lincoln County and follows a winding course generally west through the Siuslaw National Forest to enter the bay south of Lincoln City on the Pacific Ocean. It passes under U.S. Route 101 just before reaching the bay.
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.
Oak Creek is a tributary, about 3.5 miles (5.6 km) long, of Marys River in Benton County in the U.S. state of Oregon. The stream descends from forested hills north of Corvallis through the northwest part of the city and across the campus of Oregon State University.
Myrtle Creek is a short tributary of the South Umpqua River in Douglas County in the U.S. state of Oregon. Its main stem, formed by the confluence of two forks just south of the city of Myrtle Creek, is only about 1 mile (1.6 km) long. Its only named tributaries are the two forks, North Myrtle Creek and South Myrtle Creek, each of which is much longer than the main stem.
Mill Creek is a tributary of the Mohawk River in Lane County in the U.S. state of Oregon. It begins in the foothills of the Cascade Range northeast of Springfield and flows generally west through Wendling to meet the river near Marcola. The confluence is about 13 river miles (21 km) from the Mohawk's mouth on the McKenzie River. Mill Creek's named tributaries from source to mouth are Straight, Nebo, Deer, Oshkosh, and Wolf creeks.
Cavitt Creek is a tributary of the Little River in Douglas County in the U.S. state of Oregon. From its source near Red Butte, the creek flows generally west then north through the Umpqua National Forest of the Cascade Range before entering the river about 1.5 miles (2.4 km) upstream of the rural community of Peel and 7 miles (11 km) above the Little River's mouth on the North Umpqua River.
Pass Creek is a tributary of Elk Creek in the Umpqua River basin of the U.S. state of Oregon. It begins at Divide between the Coast Fork Willamette River watershed and the Umpqua watershed along Interstate 5 (I-5) in Lane County. It flows west into Douglas County and continues generally southwest to meet Elk Creek at the city of Drain, 24 miles (39 km) upstream of Elk Creek's confluence with the Umpqua.
