70 Miles of Coast
Your guide to San Diego — beaches, trails,
tide pools, neighborhoods and things to do.

Field guide index

Geology

Explore geology through our San Diego field notes. Find practical guides, coastal context and links to the official information you need before heading out.

King-tide panorama at the D Street shoreline, photographed by L. Cox for the U.S. Fish and Wildlife Service
San Diego coast

King Tides San Diego: Dates, Viewing and Safety

Check official king tide dates for San Diego, understand local tide times and choose safe, elevated places to observe high water.

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Aerial view of the San Clemente and San Onofre coast, the wider setting of the Cristianitos Fault
San Onofre / San Clemente border coast

Cristianitos Fault, San Diego Coast: A Geology Guide

Understand the fault through California’s official geology guide without treating an exposed cliff as a climbing destination.

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Layered cliffs above Black's Beach, illustrating the coastal setting rather than a specific collapse
La Jolla / Torrey Pines

Torrey Pines Landslide: Black's Beach Cliff Collapse History

Understand the documented 2023 Black's Beach landslide, why coastal cliffs can fail and how official safety guidance applies to visitors.

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