• The Point Reyes Beach as viewed from the Point Reyes Headlands

    Point Reyes

    National Seashore California

Faults

Nature and Science

The San Andreas Fault bisects the Point Reyes peninsula from the California mainland.

The San Andreas Fault Zone is present at Point Reyes National Seashore and separates the Pacific plate from the slowing moving North American plate. The Pacific plate is estimated to creep northwestward about two inches a year but the most dramatic displacement of this fault occurred in 1906 when the Point Reyes Peninsula leapt 20 feet northwestward. The most accessible location within Point Reyes National Seashore to view the San Andreas Fault Zone is from the Earthquake Trail, located off of the parking lot at the Bear Valley Visitor Center.

To learn more about the 1906 Earthquake, the San Andreas Fault and Plate Tectonics, check out our 1906 Earthquake Centennial Resource Newsletter and the Point Reyes National Seashore Geologic Activity webpage.

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Did You Know?

Fog-filled valley with yellow twilight glow over a ridge in the background. © John B. Weller.

The rich, lush environment of Point Reyes heavily depends on the fog. During rainless summers, fog can account for 1/3 of the ecosystem's water input. But recent studies have indicated that there has been about a 30 percent reduction in fog during the last 100 years here in coastal California. More...