Just throwing this out. Yesterday we drove along the coast from Goat Rock Beach south to Hog Island Oyster Company for a great lunch of BBQ oysters. Returning we took a wrong turn on Marshall Petaluma Road that turned out to be one of the most spectacular drives I have ever done. The scenery along that road is truly stunning. Reminded us of the Scottish Highlands. I highly recommend this.
Perfect time of year for that too as the grass is green. Yesterday was crystal clear out too.
Technically you were in Marin County.