The North Fork South Branch Potomac River, 43.6 miles (70.2 km) long, [4] forms just north of the Virginia/West Virginia border in Pendleton County at the confluence of the Laurel Fork and Straight Fork along Big Mountain 3,881 feet (1,183 m).

The South Branch of the Potomac River rises in Highland County, Virginia, and flows northeastward across the eastern panhandle of West Virginia to its junction with the North Branch of the Potomac River near Green Spring, West Virginia, a distance of more than 200 miles.

Apr 1, 2024 · The South Branch of the Potomac River flows from the ridge and valley area of Pendleton County north through the Eastern Panhandle of the state and meets with the North Branch to create the Potomac River.

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The source of the North Branch Potomac River is at the Fairfax Stone located at the junction of Grant, Tucker and Preston counties in West Virginia. From the Fairfax Stone, the North Branch Potomac River flows 27 mi (43 km) to the man-made Jennings Randolph Lake, an impoundment designed for flood control and emergency water supply. Below the ...

Originating just across the state line near Monterey, Virginia, the South Branch traverses about 131 miles before joining with the North Branch near Green Spring to form the Potomac River. With the exception of two stretches, the South Branch is easily accessible by various roads.

Map of sites near South Branch Potomac River -- a Tributary, one of many historic and recreation sites on the Potomac River.