Hogback Mountain is part of Catoctin Mountain, located southwest of Leesburg in Loudoun County, Virginia. The mountain ridge rises immediately to the west of U.S. Route 15, just south of Sycolin Creek and extends 2.5 miles (4.0 km) south to the banks of Goose Creek. It is so named for its appearance when approaching it from the north of resembling a pig on its back.