[ginkgotree]

Grab a Getaround or Zipcar and get north of the Golden Gate Bridge. Everyone only goes as far a Muir woods - don't it's packed of tourists with visor caps and selfie sticks and you'll get annoyed. Drive a little further and Hike Mount Tam - amazing views of the bay. Go to Sonoma for wine, not Napa.

[hocuspocus]

Not sure you can sign up for Getaround as a tourist. Zipcar is possible though.

+1 for Sonoma county for wine, and arguably the best brewery in the world too (Russian River ;)