There are two routes. The first is a 3-mile ride to be ridden as many times as participants wish between 9am and 11am, beginning and ending at the SAC Loop. The second ride begins at 8am and must be registered for in advance by mail (or presumably one can drop it off at the office on Harbor Road in Stony Brook). This is a 30-mile ride from the SAC to Mt. Sinai and back.
Please see the following link for the registration form and more information: