I'll be in SF next week and as of right now the weather looks decent and I'm pondering renting a bike for the day. Any suggestions on a nice day ride, say around 200 to 300 miles total, with some scenery and/or interesting places to stop? Is traffic a nightmare taking the coast down to Monterrey? Any of the giant redwoods north of the GG Bridge (mapquest shows some kind of "green" park in that area)? Is the Sonoma/Napa area worth visiting if you have no desire to do a winery tour? Thanks for your ideas!