Tom M from Raleigh NC on 10/26/2015 3:19:00 PM:
The GAP-C&O trails are not entirely unpaved, but at least 90% so. Sections of the GAP are paved during the first 20 miles leaving Pittsburgh and heading east, on short sections near many of the larger towns, and the final 3-4 miles before you reach Cumberland. Very little if any of the C&O is paved, perhaps a short section leaving Cumberland. However, the Western MD rail trail parallels the C&O for about 20 miles near Hancock, and it is all paved.