From a posting in a nudist forum:
California has many nude beaches. One of the most popular is San Francisco's Baker Beach with its fantastic view of the Golden Gate Bridge nearby. SOUTHBOUND from the Golden Gate Bridge, take the 25th Ave. exit. Turn right onto Lincoln Blvd. Then take a right at Bowley St. NORTHBOUND, take I-280's 19th St. Exit, then north on 19th, turning left onto 25th Ave. Turn right onto Lincoln, and then left onto Bowley St. The nude beach is at the very east end of Baker Beach near the south end of the Golden Gate Bridge.