Fort Spring is an unincorporated community and town in Greenbrier County, West Virginia, United States. It is situated along the Greenbrier River within the Greenbrier River Watershed. It was once a substantial portion of the Chesapeake and Ohio railway by way of the Gravel Girtie route from Hinton in Summers County to Clifton Forge, Virginia. The …Fort Spring is an unincorporated community and town in Greenbrier County, West Virginia, United States. It is situated along the Greenbrier River within the Greenbrier River Watershed. It was once a substantial portion of the Chesapeake and Ohio railway by way of the Gravel Girtie route from Hinton in Summers County to Clifton Forge, Virginia. The name is derived from its main export; Mississippian limestone from Snowflake Quarry sent to Clifton Forge. The main road going through the small town was once the original rail line, but was moved.