Fort Bridger: Agate & Jasper Rockhounding in Uinta County, Wyoming

Updated June 2026

Fort Bridger is a mapped rockhounding spot in Uinta County, Wyoming. Reported finds include agate, jasper, silicified agate. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Uinta County
State: Wyoming
Coordinates: 41.33294, -110.37117

Geology at Fort Bridger

This spot sits on ground mapped as Alluvium that formed within roughly the last 129,000 years. Gravels like these concentrate whatever survives the river: agate, jasper, and other tough silica typically show up as rounded, waxy stones.

Mapped unit: Alluvium
Age: < 1 Ma (Late Pleistocene to Holocene)
Elevation: 6,610 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 Fort Bridger

Best months: April to October. Typical highs run 80°F in midsummer and 33°F in midwinter, with winter lows near 12°F.

Climate normals: NOAA 1991-2020 monthlies, MTN VIEW station (5 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 Wyoming
Wyoming State Geological Survey
Fossil Butte National Monument
Community submissions reviewed against published agency rules

Found at Fort Bridger

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 Fort Bridger.

Across the state line from Fort Bridger

Fort Bridger is close enough to the Wyoming border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.

Fort Bridger FAQ

Where is Fort Bridger?+

Fort Bridger is in Uinta County, Wyoming, at 41.33294, -110.37117.

What rocks and minerals can you find at Fort Bridger?+

Fort Bridger is reported to produce Agate, Jasper, Silicified Agate.

Is collecting allowed at Fort Bridger?+

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 Fort Bridger?+

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 Fort Bridger?+

The most comfortable months at Fort Bridger are April to October.

How do I get to Fort Bridger?+

Open the directions link to navigate to 41.33294, -110.37117 in Google Maps. Some spots are remote, so check road conditions before driving out.

More rockhounding in Wyoming

See all 82 Wyoming spots →

Open Fort Bridger on the map

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