Dugway mining district: Agate & Amethyst Rockhounding in Tooele County, Utah

Updated June 2026

Dugway mining district is a mapped rockhounding spot in Tooele County, Utah. Reported finds include agate, amethyst, apatite, fluorite, chalcedony, and more. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Tooele County
State: Utah
Coordinates: 39.99745, -113.18596

Geology at Dugway mining district

This spot sits on Pilot Shale, Guilmette Formation, and Simonson and Sevy Dolomites, mapped as dolostone and limestone that formed roughly 410 to 345 million years ago. Chert and agate nodules typically form inside carbonate rock like this and weather out as tough, waxy lumps in soils and creek beds.

Mapped unit: Pilot Shale, Guilmette Formation, and Simonson and Sevy Dolomites
Age: 410–345 Ma (Early Devonian to Mississippian)
Rock types: dolostone and limestone
Elevation: 5,020 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 Dugway mining district

Best months: February to June. Typical highs run 94°F in midsummer and 38°F in midwinter, with winter lows near 18°F.

Climate normals: NOAA 1991-2020 monthlies, GRANITE PEAK DUGWAY PROVING GR station (14 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 Dugway mining district

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 Dugway mining district.

Across the state line from Dugway mining district

Dugway mining district is close enough to the Utah border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.

Dugway mining district FAQ

Where is Dugway mining district?+

Dugway mining district is in Tooele County, Utah, at 39.99745, -113.18596.

What rocks and minerals can you find at Dugway mining district?+

Dugway mining district is reported to produce Agate, Amethyst, Apatite, Fluorite, Chalcedony, Garnet, Topaz, Cerussite, Chalcopyrite, Chlorite, Galena, Hematite, Limonite, Pyrite, Sphalerite.

Is collecting allowed at Dugway mining district?+

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 Dugway mining district?+

Most agate and jasper is surface float: bring a spray bottle, a pick or small shovel, and a sturdy bag. Wet stones show their banding and translucence.

When is the best time to visit Dugway mining district?+

The most comfortable months at Dugway mining district are February to June.

How do I get to Dugway mining district?+

Open the directions link to navigate to 39.99745, -113.18596 in Google Maps. Some spots are remote, so check road conditions before driving out.

More rockhounding in Utah

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Open Dugway mining district on the map

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