If you have a full day, consider the alternative of
- north to Healdsburg via 101
- River Road toward Guerneville
- Armstrong Redwoods
- Guerneville, then inland toward…
- Sebastopol, via Forestville
- back to 101 from Sebastapol and south to
- Sausalito
Healdsburg is worth time for art galleries. Guerneville and Sebastopol too, briefly for galleries and/or artist studios. Dinner in Sausalito and walk around and enjoy the town and views.
Alternative if the ocean calls to you
Mill Valley to Pt Reyes Station via Larkspur, Samuel P Taylor Park, Olema - and then from Pt. Reyes Station out to Pt Reyes National Seashore, if you’re good on time but that trip to the National Seashore will add some time. … From there, back to Pt. Reyes Station and then down Highway 1 through Stinson Beach and across the Golden Gate Bridge.
Or, what I originally suggested … Sonoma, Valley of the Moon and perhaps Jack London state park, Santa Rosa, Healdsburg, then south down 101 to Sausalito and finally south across the GG bridge to SF. I failed to mention in my first post that the town of Sonoma around the Square is a great place to visit for 30 to 60 minutes.
On any of these, see what locally made cheese shops/farms/producers are along your way (and open).
Either way, to get to the Airport hotel area avoid continuing on 101 south from the GG Bridge. (101 in SF means city streets and lots of traffic; whoever suggested SF to Sonoma County was 30 minutes left out that consideration; it’s at least an hour.)
Instead, follow Highway 1 down through the Presidio, GG Park, and 19th Ave to Interstate 280 and then follow I-280 to Interstate 380 to SFO.
Love the area. Grew up in the Bay Area. Moved to Seattle 50 years ago, yet still visit the Sonoma area a fair bit with my wife and sometimes with our son who lives in Mt View.
BTW, if you’re a beer drinker, the Lagunitas Brewery in Petaluma is a great stop for a sandwich or a burger and a flight of brews, if the timing is right for you, perhaps a dinner alternative to Sausalito on the way south from either Healdsburg or Sebastopol.