C&O Canal National Historical Park: free towpath (outside Great Falls)
Hours vary by area; check the park before you go
Chesapeake and Ohio Canal National Historical ParkWashington
The C&O Canal park covers 184.5 miles of historic canal and towpath for walking, running and biking. The park is free to visit everywhere except the Great Falls Tavern area in Potomac, MD, which needs an entrance pass.
Verified Oct 27 · National Park Service
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