Tucked in the Marin Headlands, Tennessee Valley opens a clear plain to the ocean through the scrub and grasses. A small creek cuts through the valley to a tiny beach. The Tennessee Valley trail is open to hikers, bicyclists, and equestrians. Miwok Livery Stables, located just south of the parking...

Within the blissfully remote Marin Headlands , Tennessee Valley has become a prime destination spot for casual hikers, bikers, and riders. Down the valley, mountainous sentinels stand guard over a tiny idyllic beach and a sensational framed view of the Pacific. But to experience the lonesome solidarity that nature can...

For a look at the old Air Force station, start at the Mountain Theater overflow lot and cross Ridgecrest to start on the Rock Spring-Lagunitas Fire Road. Continue to Potrero Meadow and on to Rifle Camp. From there, cross the dry creek to the Arturo Trail and hike up to...