lizbids:
If you are determined to do it, check out the ride library of the NYCC. They have a couple of different routes of various lengths and difficulty.
Carol

http://www.nycc.org/rl_db/ride.aspx?id=119
http://www.nycc.org/rl_db/ride.aspx?id=93
http://www.nycc.org/rl_db/ride.aspx?id=184