John W. from Pittsburgh, PA on 2/11/2016 8:32:33 PM:
I'd also be concerned about cold weather and snow and ice still being on the ground along the trail as early March is still the tail end of winter. Especially on the C&O (which is dirt paths) this could be really rough as it needs some warmer weather to dry out a bit. While the GAP drains better as its a crushed limestone gravel rail trail, the section near the continental divide could see cooler weather up there. You might enjoy an early April trip a lot more than an early March trip maybe? No matter what time you pick, you'll have a great time!