Photo: US-Army, from the National Archives, Public domain Free beaches in San Francisco
Photo: US-Army, from the National Archives, Public domain 
Photo: BradleyPelton, CC BY-SA 4.0 Baker Beach
Free, always
Photo: Brocken Inaglory, CC BY-SA 3.0 Ocean Beach
Free, always
Photo: Viriditas, CC BY-SA 3.0