This trip will be entirely on C&O towpath from its south eastern terminus in Washington DC to Harpers Ferry and back.
C&O towpath, can be characterized as off road, gravel, or dirt road depending on the section you are riding as well as the weather conditions ( heavy rain causes a a lot of pot holes, wash offs, etc.). There is NO motorized traffic ( motor bikes, cars, etc.)
Any bike would work but I highly recommend tire width of at least 37.
Trail is nearly flat in its entirety, so it is a very easy level 1 ride. Having said that, since it is not a paved road, and the plan 60+ ride day, some may find it more difficult than others.
Current plan for overnight location is at one of C&O national park camp sites. This may change however.