Originally Posted by
PedalingWalrus
Indy,
You ride Gap and C&O so often that you pulled those out of your equation :-) Those two trails will give you multiday dirt route (although it is mostly cultivated dirt) :-)
Never done the C&O. GAP up and back last year and one-way in 2013. Forgot about that, but the GAP has plenty of services along the way. I have never done multi-day off-road having to be totally self-sufficient with food, water and places to sleep.