It's going to be a blast! jeremyb, I've started riding a 50 mile loop every Wednesday and a 100+ every Sunday. If you don't mind riding solo, there are some incredible rides out here in Marin County. I don't know much about organized centuries, but if you're ever in Marin, let me know, and I can tell you of a thousand different rides, from flat to rolling to thigh-burning-knee-killing-sadomasochistic torture-fests.