I would also recommend contacting some of the local bike clubs.

The Charles River Wheelmen (boston and metro area) http://www.crw.org have cue sheets galore on their site and are very helpful with inquiries.

North Shore Cyclists (northern MA) http://www.astseals.com/nsc/ might be able to give you some route info as well (they host the Blazing Saddles Century).

Fast & Fab in NYC (a gay cycling club) has cue sheets on their site as well. They ride all over the place. http://www.fastnfab.org.

That covers NY, MA and a bit of New HAmpshire. Any clubs in Maine and Vermont?