You can ride the same route for free on the lake front path 24/7/52/365, and not have to get up at a$$ o'clock on sunday morning or weave your way through spandex-clad yuppies on hybrids (ok, less of them at least). CBF is a great organization, though, and if you want to do bike the drive you should scrape up the $25 for an individual membership or $15 for students, which gets you $10 off the entry fee and 10% off at yojimbo's and a lot of other shops.