Sierra Blanc: Turquoise Rockhounding in Hudspeth County, Texas

Updated June 2026

Sierra Blanc is a mapped rockhounding spot in Hudspeth County, Texas. Reported finds include turquoise. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Hudspeth County
State: Texas
Coordinates: 31.25677, -105.42668

Geology at Sierra Blanc

This spot sits on intrusive rocks, mapped as basalt, trachyte, and felsic volcanic that formed roughly 34 to 23 million years ago. Copper minerals such as malachite and chrysocolla typically show up where mineralized rock like this has weathered and oxidized near old workings.

Mapped unit: intrusive rocks
Age: 34–23 Ma (Oligocene)
Rock types: basalt, trachyte, and felsic volcanic
Elevation: 5,540 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.

Best time to visit Sierra Blanc

Best months: July to May. Typical highs run 89°F in midsummer and 54°F in midwinter, with winter lows near 19°F.

Climate normals: NOAA 1991-2020 monthlies, FT HANCOCK 8SSE station (19 mi away), adjusted for elevation.

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.

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.

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

Texas Parks and Wildlife Department
Bureau of Economic Geology — Texas geology
Big Bend National Park — Rules
Community submissions reviewed against published agency rules

Found at Sierra Blanc

Each chip opens all spots that produce that material; the encyclopedia link opens the full ID and field guide.

Turquoise Encyclopedia →

Nearby rockhounding spots

Other rockhounding spots within driving distance of Sierra Blanc.

Sierra Blanc FAQ

Where is Sierra Blanc?+

Sierra Blanc is in Hudspeth County, Texas, at 31.25677, -105.42668.

What rocks and minerals can you find at Sierra Blanc?+

Sierra Blanc is reported to produce Turquoise.

Is collecting allowed at Sierra Blanc?+

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. Always confirm current rules with the managing agency before a trip.

What tools should I bring to Sierra Blanc?+

A rock hammer, gloves, and safety glasses are enough for oxidized copper ground. Look for green and blue staining on weathered rock and in old dump piles.

When is the best time to visit Sierra Blanc?+

The most comfortable months at Sierra Blanc are July to May.

How do I get to Sierra Blanc?+

Open the directions link to navigate to 31.25677, -105.42668 in Google Maps. Some spots are remote, so check road conditions before driving out.

More rockhounding in Texas

See all 94 Texas spots →

Open Sierra Blanc on the map

Use the RockHoundR app for live land overlays, weather, geology, directions, and saved finds.