The rocky points of this 5.6-mile coastal hike offer some of the best tidal pool viewing in Southern California. Go at low tide to see crabs, sea stars, anemones, and sea hares.

This 6.5-mile loop passes through sage, chaparral, and oak groves to a high plateau with panoramic views of the Santa Ana Mountains.

GUMBOOT TRAILHEAD to CA 3: High in the Trinity Alps, this 32.9-mile ridge section views the headwaters of the Trinity River and countless alpine lakes.

CA 3 to CARTER MEADOWS SUMMIT: Pass rocky lake basins and deep, glacially scoured canyons on this 18.5-mile leg across the slim ridges of the Scott Mountains.

This 23-mile out-and-back in the Trinity Alps features pristine mountain lakes, stunning views and an easy, off-trail scramble.

Trek 24.4 miles to a 200-foot, glacier-fed waterslide, then bag the highest peak in the Trinity Alps. Bring a fly rod for rare red-meat brook trout.

A lakeside campsite awaits at the end of this 4.2-miler that passes old-growth cedars, a mining camp, and meadows splashed with wildflowers.

Before Napa Valley got its grapevine rep, the landscape likely resembled 2,000-acre Bothe-Napa Valley State Park, where redwoods shade this mellow 4.6-mile trail.

This 9.6-mile hike offers a tour of the Marin Headlands, then loops to include fine bluff views of San Francisco Bay and the Pacific. Bring extra clothes; the weather changes quickly.

This 5-mile loop wanders through huge redwood stands along the western slope of the Santa Cruz Mountains. Extend the trip with an overnight at a Sierra Club hut.