The Shenandoah River is the principal tributary of the Potomac River, 55.6 miles (89.5 km) long with two forks approximately 100 miles (160 km) long each, in the U.S. states of Virginia and West Virginia. The river and its tributaries drain the central and lower Shenandoah Valley and the Page Valley in the Appalachians on the west side of the Blue Ridge Mountains, in northwestern Virginia and the eastern panhandle of West Virginia. There is a hydroelectric plant along the Shenandoah River constructed in 2014 by Dominion.
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 Feather River is the principal tributary of the Sacramento River, in the Sacramento Valley of Northern California. The river's main stem is about 73 miles (117 km) long. Its length to its most distant headwater tributary is just over 210 miles (340 km). The main stem Feather River begins in Lake Oroville, where its four long tributary forks join—the South Fork, Middle Fork, North Fork, and West Branch Feather Rivers. These and other tributaries drain part of the northern Sierra Nevada, and the extreme southern Cascades, as well as a small portion of the Sacramento Valley. The total drainage basin is about 6,200 square miles (16,000 km2), with approximately 3,604 square miles (9,330 km2) above Lake Oroville.
The Tule River, also called Rio de San Pedro or Rio San Pedro, is a 71.4-mile (114.9 km) river in Tulare County in the U.S. state of California. The river originates in the Sierra Nevada east of Porterville and consists of three forks, North, Middle and South. The North Fork and Middle Fork meet above Springville. The South Fork meets the others at Lake Success. Downstream of Success Dam, the river flows west through Porterville. The river used to empty into Tulare Lake, but its waters have been diverted for irrigation. The river reaches Tulare Lake during floods. Tulare Lake is the terminal sink of an endorheic basin that historically also received the Kaweah and Kern Rivers as well as southern distributaries of the Kings.
Catoctin Creek is a 14.1-mile-long (22.7 km) tributary of the Potomac River in Loudoun County, Virginia, with a watershed of 59,000 acres (240 km2). Agricultural lands make up 67 percent and forests 30 percent of Catoctin Creek's watershed. It is the main drainage system for the northern Loudoun Valley, including all of the Catoctin Valley.
The Nishnabotna River is a tributary of the Missouri River in southwestern Iowa, northwestern Missouri and southeastern Nebraska in the United States. It flows for most of its length as two parallel streams in Iowa, the East Nishnabotna River and the West Nishnabotna River. The east and west branches are each about 120 miles (190 km) long; from their confluence the Nishnabotna flows approximately another 16 miles (26 km).
The Moormans River is a 14.3-mile-long (23.0 km) tributary of the South Fork of the Rivanna River in central Virginia in the United States. Via the Rivanna and James rivers, it is part of the watershed of Chesapeake Bay.
The Embarras River is a 195-mile-long (314 km) tributary of the Wabash River in southeastern Illinois in the United States. The waters of the Embarras reach the Gulf of Mexico via the Wabash, Ohio, and Mississippi Rivers. The river drains a watershed around 1,566,450 acres (6,339.2 km2) in an agricultural region. It arises near Champaign-Urbana and flows south to near Vincennes, Indiana. The name comes from French explorers, who used the French word, embarras, for river navigation obstacles, blockages, and difficulties relating to logjams.
Goose Creek is a 53.9-mile-long (86.7 km) tributary of the Potomac River in Fauquier and Loudoun Counties in Northern Virginia. It comprises the principal drainage system for the Loudoun Valley.
The North River is a 55.3-mile-long (89.0 km) river in the mountains and Shenandoah Valley of northern Virginia, the United States. It joins the South River at Port Republic to form the South Fork Shenandoah River.
The Palix River is a stream in the U.S. state of Washington. Its tributaries include three forks, North, Middle, and South Fork Palix River, as well as the Canon River. The river's length, including the Canon River, its longest tributary, is approximately 14 miles (23 km).
The Little Dry River is a 10.9-mile-long (17.5 km) tributary of the North Fork Shenandoah River in the U.S. state of Virginia. It rises in Rockingham County just east of the Virginia-West Virginia border near the crest of Shenandoah Mountain and flows east, joining the North Fork just west of the village of Fulks Run.
The Lynch River is a 9.8-mile-long (15.8 km) tributary of the North Fork Rivanna River in the U.S. state of Virginia. It is part of the James River watershed. It rises at the unincorporated community of Mission Home near the boundary of Shenandoah National Park and flows southeast past Shady Grove and Nortonsville to join the Roach River, forming the North Fork of the Rivanna at their confluence. The Lynch River flows through Greene and Albemarle counties, crossing their boundary several times.
The Middle River is a 70.6-mile-long (113.6 km) river in the U.S. state of Virginia. Flowing entirely within Augusta County, the Middle River joins the North River, which in turn meets the South River at Port Republic to form the South Fork Shenandoah River.
The Roach River is an 11.0-mile-long (17.7 km) tributary of the North Fork Rivanna River in the U.S. state of Virginia. It is part of the James River watershed.
The Satsop River is a stream in the U.S. state of Washington. It has three main tributary forks, the East Fork, West Fork, and Middle Fork Satsop Rivers. The main stem Satsop River is formed by the confluence of the West and East Forks. The Middle Fork is a tributary of the East Fork. The three forks are much longer than the main stem Satsop itself, which flows south from the confluence only a few miles to join the Chehalis River near Satsop, Washington. Other significant tributaries include the Canyon River and Little River, both tributaries of the West Fork Satsop, and Decker Creek, a tributary of the East Fork Satsop River. The Satsop River's major tributaries originate in the Olympic Mountains and its southern foothills, the Satsop Hills, within Grays Harbor and Mason counties. Most of the Satsop River's watershed consists of heavily wooded hill lands. The upper tributaries extend into Olympic National Forest, approaching but not quite reaching Olympic National Park.
The North Fork Clearwater River is a major tributary of the Clearwater River in the U.S. state of Idaho. From its headwaters in the Bitterroot Mountains of eastern Idaho, it flows 135 miles (217 km) westward and is dammed by the Dworshak Dam just above its mouth in north-central Idaho. Draining a rugged watershed of 2,462 square miles (6,380 km2), the river has an average flow of over 5,600 cubic feet per second (160 m3/s), accounting for a third of the discharge from the Clearwater basin. The river drains parts of Clearwater, Shoshone, Latah, and Idaho counties. Most of the watershed is managed by the U.S. Forest Service. Some of the fish of the river include westslope cutthroat trout, rainbow trout, mountain whitefish, and the threatened bull trout. It also has smallmouth bass and a kokanee salmon run, both from Dworshak Reservoir. The North Fork drainage is home to grizzly bears, cougars, deer, moose, black bear, elk, grey wolves, and osprey. The river used to have a large steelhead run before the implementation of Dworshak Dam. The North Fork of the Clearwater is located within the Clearwater National Forest
Reedy Creek is a tributary of the Little Kanawha River in western West Virginia in the United States. Via the Little Kanawha and Ohio rivers, it is part of the watershed of the Mississippi River, draining an area of 133 square miles (340 km2) in a rural region on the unglaciated portion of the Allegheny Plateau. It is 22.6 miles (36.4 km) long, or 38.5 miles (62.0 km) long including its Left Fork.
Arnold Creek is a tributary of Middle Island Creek, 10.9 miles (17.5 km) long, in West Virginia in the United States. Via Middle Island Creek and the Ohio River, it is part of the watershed of the Mississippi River, draining an area of 34.7 square miles (90 km2) in a rural region on the unglaciated portion of the Allegheny Plateau.
The Laurel Fork is a 15.7-mile-long (25.3 km) stream in Virginia and West Virginia, United States. The stream flows north from Highland County, Virginia, where its source and the majority of its length is located, to its mouth in Pendleton County, West Virginia. Laurel Fork is a tributary to the North Fork South Branch Potomac River, making it a part of the Potomac River watershed. The area surrounding Laurel Fork is home to several plant and animal species found nowhere else in Virginia, and is a prime example of a northern boreal forest in the state.
