Longtime San Francisco residents and intrepid hikers David Weintraub and Ben Pease have selected 44 "must-do" trips for hiking, running, and bicycling. Trails range from easy strolls to all-day treks, from 2 to 12 miles, covering the most scenic parks and preserves between Santa Rosa and San Jose. The second edition features new hikes in Muir Woods and the Presidio, more elevation profiles, and at-a-glance information helps you find the best wildflowers, fall color, bird-watching, camping, historic sites, and cool hikes for hot days.