Marin Municipal Water District Watershed: Sky Oaks Trailhead Sky Oaks Rd & Bolinas Rd, Fairfax, CA94930 Sky Oaks Trailhead of Marin Municipal Water District Watershed offers breathtaking views of Marin County's rolling…More hills and natural beauty. Visitors, except those with disabled placards, must purchase day passes or pay annual fees before entering the park. Permitted activities include hiking, biking, dog walking, horseback riding, fishing and picnicing. Sky Oaks Trailhead provides access to three man-made lakes: Alpine, Bon Tempe, and Lagunitas. Many people like fishing at Bon Tempe Lake, though there is a fishing license required for those over age 16. Others can enjoy the picnic area and flat trails around Lake Lagunitas. Alpine Lake has no trail all the way around, but Kent Trail covers about 2 miles of Alpine's shoreline.