Ronald from Chicago on 5/28/2007 3:59:47 PM:
I rode from just south of Pittsburgh Airport to Washington, DC May 14-21, this year. Starting on Montour Trail around Pittsbugh, then ATA trail and C&O Towpath. ATA section from McKeesport, PA to Cumberlund, MD is all complete except for one bridge, which requires a short walk around. Excellent scenery along ride. Surface is comparable to Katy Trail with long gradual climb in south direction before Big Savage Tunnel. Towpath is flat with dirt and crushed stone surface, rough and muddy in spots with occasional exposed rock or root. I used 700x38 cm tires and had no real problems. A lot of towpath passses through heavily wooded somewhat remote areas. Limited number of places to stay and eat along both trails, so need to plan ahead. Excellent guides available online from Allegany Trail Alliance and Washington, DC bicycle advocacy organization.