Rockhounding in San Mateo County, California
2 mapped rockhounding spots in San Mateo County. Most commonly produces chert, chromite, jasper.
Map showing 2 rockhounding spots in San Mateo County, California
Spots in San Mateo County
| Spot | Minerals | Coordinates | Access |
|---|---|---|---|
| Coyote Point | 37.5915, -122.3204 | Public | |
| Crystal Springs ReservoirSawyer Camp Trail | 37.5474, -122.3874 | Public |
Other rockhounding counties in California
- San Bernardino County8 spotsTop: Jasper, Blue Agate, Chalcedony
- San Diego County8 spotsTop: Lepidolite, Quartz, Beryl
- Los Angeles County7 spotsTop: Banded Agate, Bloodstone, Chalcedony
- Trinity County7 spotsTop: Jade, Anthophyllite, Chalcedony
- Kern County6 spotsTop: Agate, Jasper, Chalcedony
- Siskiyou County6 spotsTop: Agate, Petrified Wood, Bloodstone
San Mateo County FAQ
Where can I rockhound in San Mateo County, California?+
RockHoundR tracks 2 rockhounding spots in San Mateo County. Each entry below has coordinates, mineral notes, and access type. Always confirm local rules before collecting.
What rocks and minerals are common in San Mateo County?+
Spots in San Mateo County most often produce Chert, Chromite, Jasper. Individual spots can vary widely.
Are these San Mateo County rockhounding spots on public land?+
Most spots in this list are tagged public, but access can change with seasons, claims, and local closures. Always verify before driving out — links in the app open the right BLM, USFS, or county pages.
Plan a San Mateo County rockhounding trip
Open RockHoundR to see these spots on the map alongside land overlays, weather, geology, and your saved finds.
