tucker... you can cut over in mendocino (128), if need be.. and it'd be a gorgeous albeit slightly curvy road. It'll take you to 101 and then you can go thru gorgeous wine country. Lots of rides out there. I just don't know the specific routes.
You can cut over in Sonoma too.. go thru Occidental. I forget what road/highway though takes you there.. You can look it up though. Or take 116 east thru Guerneville till you hit 101.
You should really check out the Pt Reyes area though. It's pretty with lots of hikes.
There's rides all through Sonoma and Marin. Heck, take him up Mt Tam for a jaunt (evil grin).
Push the pedal down watch the world around fly by us