"Section B of the Billy Goat Trail is one of three trails with that name that follow the Potomac River from mile marker 14 along the canal to mile 10 in the Chesapeake and Ohio Canal National Historical Park.

Each of the Billy Goat Trails is accessible via the towpath; they follow the river and then loop back to the towpath. All three trails traverse the metamorphic rock that dominates this area of the riverbank as the river crosses the fall line and the land transitions from the Piedmont Plateau to the Atlantic Coastal Plain."

--Jennifer Chambers , Best Hikes with Kids: Washington, DC, the Beltway & Beyond (The Mountaineers Books).