John W. from Pittsburgh, PA on 3/21/2017 6:58:11 PM:
Also, don't forget the Western Maryland Rail Trail! This is a paved 22.5 mile trail that runs parallel to the C&O. Many people welcome this respite from the tree-roots, rocks, and puddles of the canals dirt path.
If coming from Pittsburgh, the exact mile marker is C&O Mile 136.3. A small connector path puts you at the western terminus of the WMRT, Mile 22.5. As you head east, you will pass through Hancock, MD and head towards WMRT Mile 0. There are seven other connection points if you happen to miss the ones on the each end. The last chance to get back onto the C&O is at WMRT Mile 0.75 (about 3/4 of a mile shy of Mile 0 and the eastern terminus of the WMRT). Basically once you pass WMRT Mile 1, keep an eye out for your turn off. When reentering the C&O, you’ll be at C&O Mile 114.5.
If coming from DC, the exact mile marker is C&O 114.5. This connects you to the eastern terminus of the WMRT (Mile 0.75). As you head west, you pass through Hancock, MD and head towards WMRT Mile 22.5. It dead ends there and you can see the little connector path to the C&O which puts you at C&O Mile 136.3.
Both are marked but I wouldn't say "clearly" marked. If you reach WMRT Mile 0, you've gone too far and need to backtrack approx. 3/4ths of a mile to get to the C&O connection point. WMRT Mile 0 just dead ends into local streets but there is no way to get back to the C&O from there. Did I mention this is a paved trail? :-)