McDermitt: Copper & Lead Rockhounding in Humboldt County, Nevada

Plan your visit

Generally open to casual rockhounding

County

Humboldt County

State

Nevada

Nearest road

Cordero Mine Road

Coordinates

41.91865, -117.81272

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 records active mining claims in this area. Collecting from inside an active claim needs the claim holder's permission.

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 McDermitt

Comfortable months (45 to 90°F highs)

Best months: February to June. Typical highs run 91°F in midsummer and 40°F in midwinter, with winter lows near 17°F.

Climate normals: NOAA 1991-2020 monthlies, MCDERMITT station (7 mi away).

Geology at McDermitt

This spot sits on Older alluvium and alluvial fan deposits, mapped as coarse alluvium and fine alluvium that formed within roughly the last 5 million years. Stream-worked gravels like these are where placer gold tends to concentrate, settling toward bedrock, inside gravel bars, and behind boulders.

Mapped unit

Older alluvium and alluvial fan deposits

Age

5 Ma to present (Pliocene to Pleistocene)

Rock types

coarse alluvium and fine alluvium

Elevation

4,630 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 Nevada, Recreation
• Nevada Bureau of Mines and Geology
• Royal Peacock Opal Mine (fee-dig operator)
• Community submissions reviewed against published agency rules