Me, again. Just checked some stats from my BikeJournal and here's mileage on the routes below:
Harper's Ferry > Shepherdstown is roughly 25 miles round trip, with food options at either end. From Harper's Ferry up to Dam 3 is a very beautiful stretch of the towpath/river, I highly recommend this section. Parking's tight on the MD side of the river near Harper's Ferry, though, so you might want to start at Sheperdstown and head downstream.
Williamsport > Shepherdstown is looooong and has the detour in the middle of it. I'm not sure of the exact mileage, but I'd guess that it's over 30 miles one-way. But from Shepherdstown to Big Slackwater (where the detour area begins) is just shy of 30 miles round-trip. And there are two parking lots on the MD side of the river across from Shep'town.
Williamsport > Ft Frederick is approx. 30 miles round-trip, depending on where you turn around. I usually ride to the top of Big Pool (you'll know it when you see it), then head back. Food options are limited in Williamsport, but it's got good parking and a Nat'l Park office/C&O musuem.
Sorry if this has become info overload, but the accumulated knowledge just started spilling out. I've now re-corked the bottle :rolleyes: ;)
I also wanted to let you ladies know that I'm not going to be able to do the October through-ride. I'm just not prepared for it, in so many ways. But I'm planning to do my annual Cumberland vacation around that time, so I'd love to join you on the day you go through the Paw Paw Tunnel. That is a lot of fun, and another really beautiful section of the towpath. And, trust me, it's better without a flashlight!
http://i193.photobucket.com/albums/z...size/004-b.jpg