Bean Hollow State Beach, located on the San Mateo Coast just south of Pescadero, offers excellent opportunities for tidepooling with an extensive area of rocks that becomes revealed at low tide. The tafoni rock features many grooves and holes which are perfect for sea urchins and these purple creatures were literally everywhere. There were also many crabs, small fish in the pools, and dozens of harbor seals basking in the sunlight. The beach itself is extremely pretty with a nice stretch of sand tucked in among the rocks (prior post here). More photos: seals, sea life, setting.
Leor Pantilat's Adventures