Here's a link for for a written route but breaking off and going all the way downtown.
http://bikewashington.org/routes/dc2balt/index.htm

This is also shows how one can't bike through Columbia. Columbia has many miles of trails but bicyclist prefer to take the roads route east of rt 1.

cointelpro: I think growing up in Columbia would have been great. Probably still is. It's just a hard place to navigate for a roadie. Charlie