The Billy Goat Trail is a 4.7-mile hiking trail that follows a path between the C&O Canal and the Potomac River within the Chesapeake and Ohio Canal National Historical Park near Great Falls in Montgomery County, Maryland. The trail has three sections: Section A, the northernmost, is 1.7 miles ; Section B is 1.4 miles ; and Section C, the southernmost, is 1.6 miles