El Paso Mountains: Agate & Opal Rockhounding in Kern County, California

Plan your visit

Generally open to casual rockhounding

County

Kern County

State

California

Nearest road

EP170

Coordinates

35.43759, -117.81594

Coordinates are approximate. Confirm the exact ground in the RockHoundR app, where land overlays show which agency manages the area.

Land & collecting status

Generally open to casual rockhounding

Most public-tagged spots sit on BLM, U.S. Forest Service, or other federal land where reasonable hand collecting of common rocks and minerals is allowed. Confirm posted rules and active mining claims before you dig.

Access note: BLM-managed public land in and around the El Paso Mountains, with wilderness and claim restrictions. Use motorized routes legally, avoid protected cultural sites, and verify land status before collecting.

Public-land rules vary by agency, season, and field office. The RockHoundR app pulls live BLM, USFS, NPS, and tribal overlays so you can see exactly which agency manages the ground at this spot.

Best time to visit El Paso Mountains

Comfortable months (45 to 90°F highs)

Best months: September to June. Typical highs run 96°F in midsummer and 53°F in midwinter, with winter lows near 30°F. Summer heat here is intense, so carry more water than you think you need and work the early morning.

Climate normals: NOAA 1991-2020 monthlies, RANDSBURG station (10 mi away), adjusted for elevation.

Geology at El Paso Mountains

This spot sits on marine rocks, undivided, unit 2 (Northern Mojave Desert and Southeastern Sierra Nevada), mapped as argillite, chert, and phyllite that formed roughly 540 to 145 million years ago. Gold in metamorphic belts like this is typically tied to quartz veins and shear zones, with placer color in the creeks that cut them.

Mapped unit

marine rocks, undivided, unit 2 (Northern Mojave Desert and Southeastern Sierra Nevada)

Age

540–145 Ma (Cambrian to Jurassic)

Rock types

argillite, chert, and phyllite

Elevation

4,880 ft

Geologic mapping via Macrostrat and the underlying state geological survey maps (CC BY 4.0). Bedrock at the surface can vary within a mapped unit.

Sources & verification

Spot details combine the public RockHoundR location dataset, normalized mineral labels, agency land-status checks in the app, and community submissions. Coordinates are approximate until verified in the field.

State guidance last verified: April 1, 2026

• BLM California, Recreational mineral collecting
• California Geological Survey
• CDFW, Suction Dredge Mining Permit Program
• Community submissions reviewed against published agency rules