Henry Mountains: Carnotite & Bentorite Rockhounding in Garfield County, Utah

Updated June 2026

Henry Mountains is a mapped rockhounding spot in Garfield County, Utah. Reported finds include carnotite, bentorite. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Garfield County
State: Utah
Coordinates: 38.06741, -110.79334

Geology at Henry Mountains

This spot sits on Laccolithic intrusions mostly diorite porphyry, mapped as diorite and monzodiorite that formed roughly 34 to 23 million years ago. Plutonic rock like this weathers slowly into grus and boulders, and the most productive collecting is typically in weathered zones and drainages.

Mapped unit: Laccolithic intrusions mostly diorite porphyry
Age: 34–23 Ma (Oligocene)
Rock types: diorite and monzodiorite
Elevation: 10,550 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 Henry Mountains

Best months: March to October. Typical highs run 84°F in midsummer and 28°F in midwinter, with winter lows near 0°F. At about 10,550 ft, snow can block access from late fall well into spring, so check conditions outside of summer.

Climate normals: NOAA 1991-2020 monthlies, HANKSVILLE station (21 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

BLM Utah — Rockhounding overview
Utah Geological Survey — collecting guidelines
SITLA — surface use rules
Community submissions reviewed against published agency rules

Found at Henry Mountains

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

Nearby rockhounding spots

Other rockhounding spots within driving distance of Henry Mountains.

Henry Mountains FAQ

Where is Henry Mountains?+

Henry Mountains is in Garfield County, Utah, at 38.06741, -110.79334.

What rocks and minerals can you find at Henry Mountains?+

Henry Mountains is reported to produce Carnotite, Bentorite.

Is collecting allowed at Henry Mountains?+

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 Henry Mountains?+

A rock hammer, sturdy gloves, safety glasses, and a collecting bag cover the basics here. Add a spray bottle: wet rock shows color and pattern that dry rock hides.

When is the best time to visit Henry Mountains?+

The most comfortable months at Henry Mountains are March to October. At about 10,550 ft, snow can block access from late fall well into spring, so check conditions outside of summer.

How do I get to Henry Mountains?+

Open the directions link to navigate to 38.06741, -110.79334 in Google Maps. Some spots are remote, so check road conditions before driving out.

More rockhounding in Utah

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Open Henry Mountains on the map

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