Crystal Springs Regional Trail

Crystal Springs Regional Trail is a county park located between San Bruno to the north and Woodside to the south.

Settled thousands of years ago by the Shalshone Indians, the Crystal Springs Reservoir (separate from San Andreas Lake to the north) is currently part of the City of San Francisco's Hetch Hetchy Reservoir water system.

Crystal Springs reservoir is long and narrow because it lies atop the San Andreas Fault.

Satellite images and maps show the long narrow San Andreas rift continuing north of San Francisco in Tomales Bay, in Point Reyes National Seashore in a straight line.

The Crystal Springs Dam survived both the 1906 earthquake and the 1989 Loma Prieta quake with no damage whatsoever, according to the U.S. Geological Survey.