The Greenbrier River Trail is a 79 mile (120 kilometer) long rail-to-trail conversion in Eastern West Virginia. The former C&O railroad right of way winds its way through the spectacular scenery of the Greenbrier River Valley in Pocahontas and Greenbrier Counties. Directly adjacent to the beautiful Greenbrier River, the packed gravel trail passes through the Monongahela National Forest, Cass, Watoga, and Droop Mountain State Parks and Greenbrier and Seneca State Forests and is surrounded by the Allegheny Mountains.