Tom M from Raleigh NC on 4/26/2017 9:24:30 AM:
A hybrid bike would be fine on C&O Canal. Tires are the more important consideration, and I would recommend at least 35 mm wide with some tread. Mud is likely the biggest obstacle you might encounter, and that depends on how much it has been raining.
I have ridden the entire C&O-GAP trail twice, both times on touring bikes. The first time I rode with 32 mm road tires (Panaracer Paselas), which were fine except for sections with mud or deep gravel. The second time, I rode with 35 mm cross tires (Clement LAS), and they worked great in all conditions.
Keep in mind that the section from Great Falls to Harpers Ferry is one of the most remote of the entire C&O Canal trail, with few places to get water or food. Make sure that you have bike tools and tire repair equipment. Bring plenty of water. From Great Falls to Georgetown is more accessible and heavily travelled but also one of the most beautiful sections. Allow plenty of time to appreciate Great Falls. There is a great place to eat there (Old Anglers Tavern), which is the ONLY place to eat for miles. It's rather expensive but worth it.