Harpers Ferry, WV (HFY) a stop on the Capitol Limited is in close proximity of the C&O Towpath. This is a hiker/bicycle trail that is under the jurisdiction of the National Park Service. About three miles west of the station stop off the Potomac River is the Huckleberry Hill primitive campsite, The campsite has a water pump, chemical toilets, grill, and picnic table. The Towpath itself begins near Washington, DC and goes west for about 175 miles mostly hugging the Potomac River..
Another option is hiking/camping the Appalachian Trail which also is in close proximity of the HFY stop. The nearest camping sites are five miles north or south of the station. The hike north or south has some severe uphill climbs.