Steep Ravine Mt. Tamalpais, Mill Valley, California. One of the secrets of California state parks are the nine Steep Ravine cabins on Mt. Tamalpais just north of San Francisco. Mt. Tam, of course, is one of the birthplaces of mountain biking. It shelters 6,300 acres of redwoods, oaks, and meadows, with views to the Farallon […]