The Monongahela River — often referred to locally as the Mon — is a 130-mile-long (210 km) river on the Allegheny Plateau in north-central West Virginia and southwestern Pennsylvania. The river flows from the confluence of its west and east forks in north central West Virginia northeasterly into southwestern Pennsylvania, then northerly to Pittsburgh and its confluence with the Allegheny River to form the Ohio River. The river is navigable its entire length via a series of locks and dams.
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 together—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.
Antietam Creek is a 41.7-mile-long (67.1 km) tributary of the Potomac River located in south central Pennsylvania and western Maryland in the United States, a region known as the Hagerstown Valley. The creek became famous as a focal point of the Battle of Antietam during the American Civil War.
Lunice Creek is a 7.3-mile-long (11.7 km) tributary of the South Branch Potomac River, belonging to the Potomac River and Chesapeake Bay watersheds. The creek is located in Grant County, West Virginia. Lunice Creek is created by its North and South Forks and empties into the South Branch at Petersburg.
Little Conococheague Creek is a 12.4-mile-long (20.0 km) tributary stream of the Potomac River in the U.S. states of Maryland and Pennsylvania. The stream rises on Two Top Mountain, west of the Whitetail Ski Resort in Franklin County, Pennsylvania, and proceeds south into Washington County, Maryland. It empties into the Potomac about 2 miles (3 km) southeast of Big Spring, Maryland. The watershed of the creek is 18 square miles (47 km2) and includes Indian Springs Wildlife Management Area. Tributaries include Toms Run.
Little Swatara Creek is a 26.0-mile-long (41.8 km) tributary of Swatara Creek in southeast Pennsylvania in the United States.
Codorus Creek is a 42.4-mile-long (68.2 km) tributary of the Susquehanna River in York County, Pennsylvania in the United States.
Powell Creek is a 16.5-mile-long (26.6 km) tributary of the Susquehanna River in Dauphin County, Pennsylvania in the United States.
Stony Fork Creek is a 4.1-mile-long (6.6 km) tributary of Babb Creek in Tioga County, Pennsylvania in the United States.
The Big Wood River is a 137-mile-long (220 km) river in central Idaho. It is a tributary of the Malad River, which in turn is tributary to the Snake River and Columbia River.
The Sol Duc River is a river in the U.S. state of Washington. About 78 miles (126 km) long, it flows west through the northwest part of the Olympic Peninsula, from the Olympic Mountains of Olympic National Park and Olympic National Forest, then through the broad Sol Duc Valley. Near the Pacific Ocean the Sol Duc River joins the Bogachiel River, forming the Quillayute River, which flows about 4 miles (6.4 km) to the Pacific Ocean at La Push. Although the Quillayute River is short, its large tributary rivers—the Sol Duc, Bogachiel, Calawah, and Dickey Rivers—drain the largest watershed of the northern Olympic Peninsula, 629 square miles (1,630 km2). The Sol Duc's watershed is the largest of the Quillayute's tributaries, at 219 square miles (570 km2).
Muddy Creek is a tributary of the Susquehanna River in York County, Pennsylvania, in the United States.
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 North Fork Feather River is a watercourse of the northern Sierra Nevada in the U.S. state of California. It flows generally southwards from its headwaters near Lassen Peak to Lake Oroville, a reservoir formed by Oroville Dam in the foothills of the Sierra, where it runs into the Feather River. The river drains about 2,100 square miles (5,400 km2) of the western slope of the Sierras. By discharge, it is the largest tributary of the Feather.
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.
Bush River is a tidal estuary in Harford County, Maryland, located about 15 mi (24 km) northeast of Baltimore. The estuary extends from the community of Riverside, south for about 9 mi (14 km), to the Chesapeake Bay. The watershed area of tidal Bush River is 125 mi2 (320 km2), and includes Aberdeen Proving Ground, a military facility.
Hammer Creek is a 19.2-mile-long (30.9 km) tributary of Cocalico Creek in Lebanon and Lancaster Counties, Pennsylvania in the United States.
Middle Creek is a 15.5-mile-long (24.9 km) tributary of Cocalico Creek in Lancaster County, Pennsylvania, in the United States. There is a dam between Hopeland and Kleinfeltersville creating a small lake in the Middle Creek Wildlife Management Area, also known as State Game Lands #46.
Conoy Creek is an 11.2-mile-long (18.0 km) tributary of the Susquehanna River in Lancaster County, Pennsylvania in the United States.
Spring Creek is a 6.0-mile-long (9.7 km) tributary of the Susquehanna River in Dauphin County, Pennsylvania, in the United States.
