Love riding the C&O. I started out with a Novara Bonita but gave it to my sister after riding a Rocky Mountain Vertex 30. The Rocky Mt is not WSD but it fit me perfectly.

Hudson Trail Outfitter carries Rocky Mountain (I bought a white '07 at the Pentagon Row store) as does Big Wheel Bikes on Spout Run (where I bought a black '06).

Good luck! If you see a white dog pulling a Rocky Mountain Vertex 30 on the C&O (or the Mall or Great Falls NP), that'd be me and my Samoyed, Gidget.