whisperingwind from Hagerstown Md on 5/20/2010 12:45:52 PM:
From Georgetown Md to Cumberland Md on the C&O, the elevation change is 605 feet in 184 miles. On the GAP, you have constant elevation changes between Cumberland and Pittsburg. So my direction of travel would be from Pittsburg to Cumberland on the GAP, however, on the C&O, I would rather start in G-town and head west to Cumberland.