C & O Canal, Chesapeake and Ohio Canal. 184.5 miles of towpath creates one of the largest biking/hiking trails in the continental US! Hilton & I have biked the entire path, not all at once but thru out the years! Starting in Georgetown in Washington DC and ending in Cumberland Maryland. One of favorite places in the World! Make sure you take a canal barge ride at the Great Falls Vistor Center. A slice of paradise just outside the bustle of DC!