The Greenbrier River Trail (GRT), is a lineal state park comprising a 77.1-mile (124.1 km) rail trail between North Caldwell and Cass in eastern West Virginia. The GRT route and its contours were originally engineered by the Chesapeake and Ohio Railway, serving as a passenger and freight line before becoming unviable after the Great Depression. The right of way was gifted to the State of West Virginia in the late 1970s and the former railbed reopened in 1980 as a recreational multi-use trail.