There is also the "short bike rides" series books - at least for Rhode Island.

Has some really nice routes, and usually 2 or 3 options for the length of the ride. Most of the long ride options are 20-30 miles, and the short versions are 10-15.

http://www.amazon.com/exec/obidos/tg...books&n=507846

You can also ride with the Narragansett Bay Wheelmen in Rhode Island - they do rides every weekend, and you don't have to be a member to join them.