The SF Bay Area allows this possiblity, though it would be most feasible by including local rail; a walk-on north-south trip between Santa Rosa and Monterey cou

The SF Bay Area allows this possiblity, though it would be most feasible by including local rail; a walk-on north-south trip between Santa Rosa and Monterey could be done by going SMART->ferry->BART->Caltrain->Hwy 17 Express->SC Metro bus. If you were very patient there are bus routes that would cover the SF-Peninsula leg. I would have to check to see if Sacramento is possible without resorting to rail or coach. Edit: actually, going to Big Sur looks to be possible with the MSC bus system. It's been a while since I rode in that region and Monterey isn't part of the SC Metro system anymore. From Big Sur I could imagine it's possible to get even further down the coast.