Photograph of Mountain Lake from 1890 and photograph of Lobos Creek from 1958.
Mountain Lake in the Presidio, c. 1890.
Lobos Creek, seen here in 1958, which drains to Baker Beach, is one of only two creeks that still run above ground in San Francisco. It provides 4 million gallons a day of fresh water to the Presidio.
Photos: Greg Gaar Collection, San Francisco, CA