Add your favorite hiking/walking/outdoorsy trails here!

Redwood Park (Oakland Hills): lovely big redwood forest nestled just behind the east bay hills.  Close-by for a wooded experience.

Mount Tamalpais "Mt. Tam" (Marin County): amazing hiking trail system from grassy hills with views of the Pacific and San Franscisco to dark, forested 'cathedral' canyon trails.  Arguably best all-day hike: Matt Davis trail to Stinson beach with Cathedral trail back up.

Muir Woods (Marin County): very easy walk in the National Monument (fee) with some trails branching off into the hills along the way.  Stop at Muir beach after for some wave-time and tidepooling near the north end.  Follow with a hot drink and british pub-fare at the Pelican Inn.