Mill Valley rests in the shadow of Mount Tamalpais, the tallest peak of the Coast Range. Ancient redwood groves cloaking the mountain's flanks and nearby canyons attracted a pioneer sawmill that gave the town its name. As the timber industry was replaced by dairies, Mill Valley became a destination for those drawn to beauty: hikers, campers, naturalists, artists, writers, and dreamers who gave the town its early bohemian atmosphere. Tamalpais Scenic Railway once ran the "crookedest railroad in the world" to the summit, where passengers exulted in the taste of salty ocean winds, rolling fog,...