The Potomac River is located within the Mid-Atlantic region of the United States and flows from the Potomac Highlands into the Chesapeake Bay. The river is approximately 405 miles (652 km) long, with a drainage area of about 14,700 square miles (38,000 km2). In terms of area, this makes the Potomac River the fourth largest river along the Atlantic coast of the United States and the 21st largest in the United States. Over 5 million people live within the Potomac watershed.
The Little Bighorn River is a 138-mile-long (222 km) tributary of the Bighorn River in the United States in the states of Montana and Wyoming. The Battle of the Little Bighorn, also known as the Battle of the Greasy Grass, was fought on its banks on June 25, in 1876, as well as the Battle of Crow Agency in 1887.
The Grande Ronde River is a tributary of the Snake River, 182 miles (293 km) long, in northeastern Oregon and southeastern Washington in the United States. It drains an area southeast of the Blue Mountains and northwest of the Wallowa Mountains, on the Columbia Plateau. It flows through the agricultural Grande Ronde Valley in its middle course and through a series of scenic canyons in its lower course.
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.
The Williams River is a tributary of the Gauley River, 33 miles (53 km) long, in east-central West Virginia, USA. Via the Gauley, Kanawha and Ohio Rivers, it is part of the watershed of the Mississippi River, draining an area of 132 square miles (342 km²) in a sparsely populated region of the southern Allegheny Mountains and the unglaciated portion of the Allegheny Plateau.
Bread Loaf Mountain is a mountain located in Addison County, Vermont, in the Green Mountain National Forest. The mountain is part of the central Green Mountains. Bread Loaf Mountain is flanked to the northeast by Mount Wilson, part of Vermont's Presidential Range.
The East Branch North Fork Feather River is a left tributary of the North Fork Feather River in the northern Sierra Nevada, Plumas County, California. Primarily within the Plumas National Forest, its course extends past Twain to near Belden.
The Middle Fork John Day River is a 73-mile (117 km) tributary of the North Fork John Day River in the U.S. state of Oregon. It originates in the Blue Mountains of northeast Oregon in the Malheur National Forest near Austin and flows generally west to the North Fork about 18 miles (29 km) above Monument. The Middle Fork drainage basin covers about 806 square miles (2,090 km2).
The East Branch Pleasant River is a 6.2-mile-long (10.0 km) tributary of the Pleasant River in the U.S. state of Maine. The Pleasant River is a tributary of the Androscoggin River, which flows southeast to the tidal Kennebec River and the Atlantic Ocean.
The North Branch Marsh River is a 1.0-mile-long (1.6 km) tidal river in the town of Frankfort, Waldo County, Maine. It is a tributary of Marsh Bay, an arm of the tidal Penobscot River.
The South Branch Sunday River is a 2.5-mile-long (4.0 km) mountain stream in western Maine. It is a tributary of the Sunday River, which flows to the Androscoggin River and ultimately to the Kennebec River and the Atlantic Ocean.
South Branch Roaring Creek is a tributary of Roaring Creek in Columbia County and Northumberland County, Pennsylvania, in the United States. It is approximately 16.8 miles (27.0 km) long. The upper reaches of the creek are located in Weiser State Forest, between Big Mountain and Little Mountain. The creek is home to some trout and is considered a high-quality coldwater fishery. The Chemung Formation occurs in the creek's watershed. The watershed is 25 square miles in area.
Birch Island Run is a stream in Cameron County and Clinton County, Pennsylvania in the United States. It is a tributary of the West Branch Susquehanna River and is 7.2 miles (11.6 km) long. There are a number of coal seams in the Birch Island Run watershed, as well as iron ore. Mining has been done in the watershed. The watershed is 15.3 square miles in area and is almost entirely forested. The stream's tributaries include Little Birch Island Run and Amos Branch. Parts of the watershed are affected by acid mine drainage. However, brook trout live in the stream.
The South Branch Grass River flows into the Grass River in Clare, New York. The South Branch Grass River and Middle Branch Grass River combine here and become Grass River.
