Awesome beach with "alternative" activities that include sport climbing, bouldering, skinny dipping, and even a nearby hot spring that can be accessed on very low tides. Park at the Red Rock Hotsprings and take the clearly marked trail down to the beach about 1/4 of mile down a steepish hill.
A beautiful, wild peninsula. Some favorite spots are the Tomales Point Hike (long), Limantour Beach (short hike), North Beach (parking lot on beach dunes), and the lighthouse. If you are in this area, you can also check out the small town of Inverness.