The West Virginia. Cyclopedia
The Trough of the South Branch of the Potomac River is created where the river flows straightly between two long ridges (Sawmill Ridge and River Ridge). George Washington, on his first surveying trip, in 1748, described the Trough as "a couple of ledges of mountain impassable running side and side together for about 7 or 8 miles and the river down between them." The Trough is a popular canoing run and fishing area and is a highlight of a journey on the Potomac Eagle scenic railway excursion, which follows the river through the narrow valley. The upstream entrance to The Trough may be reached by motor vehicle from U.S. Route 220 (US-220) north of Moorefield, West Virginia. Public access is provided to wooded and old fields parts of the area included in the South Branch Wildlife Management Area.
See also: Battle of the Trough