Mt. Diablo is one of the ecological and historical treasures of the East Bay. It has an extensive trail system, interesting (and very friendly) wildlife, amazing rock formations, beautiful wildflowers in the spring, fossilized evidence of previous inhabitants, and an unparalleled 360 degree view from its 3,800 foot summit.
Bean Hollow State Beach | The hugely underrated San Mateo coastline hides some of Northern California's most scenic beaches. Each will remind why you live in California, but the wide crescent sand shore at Bean Hollow might just be our favorite. Follow a narrow trail up and over a bluff blanketed with ice plant and discover a moonscape of tide pools and sandstone rock formations. Note that there are two distinct areas and corresponding parking lots. You want the southernmost one.