Horseshoe Bend Hiker-Biker Campsite is a free, primitive camping area located at mile 79. 2 of the C&O Canal towpath near Mercersville, Maryland, accessible only by foot or bicycle.

The site accommodates up to 8 people and 2 tents on a first-come, first-served basis with a one-night stay limit, offering basic amenities including a chemical toilet, picnic table, grill, and non-potable well water (available mid-April through mid-November).

Note that the campsite is subject to flooding after heavy rains due to its proximity to the Potomac River, and water must be filtered, chemically treated, or boiled before use.