Sutro Project / Baker Beach
Burning Man's original resting place (and now Balsa Man), Baker Beach delightfully boggles urban expectations!
A great destination at any time, bright clear days are stunning. Parking is a bigger hurdle than towel space on the warm and sunny weekends when BB gets moderately busy - and overall the beach is surprisingly uncrowded.
A great hike from either the Golden Gate Bridge, or the Land's End/Legion of Honor direction - adjoining Seacliff hosts some amazing homes (including Robin Williams), in addition to the usual commercial provisions. Bazaar Cafe is an easy walk and hosts (truly) independent live music in addition to food and beverage.
Wikipedia: http://en.wikipedia.org/wiki/Baker_Beach
