Best spot

Kemmerer: Turritella Agate & Chalcedony Rockhounding in Lincoln County, Wyoming

Q: Where is Kemmerer?

Kemmerer is in Lincoln County, Wyoming, at 41.81137, -110.47798. Nearest road: Emigrant Trail.

Q: What rocks and minerals can you find at Kemmerer?

Kemmerer is reported to produce Turritella Agate, Chalcedony, Chert, Jasper, Quartz, Petrified Wood, Silicified Wood.

Q: Is collecting allowed at Kemmerer?

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.

Q: What tools should I bring to Kemmerer?

A rock hammer, sturdy gloves, and a padded bag cover petrified wood hunting. Most pieces are surface float, so walking slopes and washes beats digging.

Q: When is the best time to visit Kemmerer?

The most comfortable months at Kemmerer are April to October. At about 7,130 ft, snow can block access from late fall well into spring, so check conditions outside of summer.

Q: How do I get to Kemmerer?

Open the directions link to navigate to 41.81137, -110.47798 in Google Maps. The nearest road is Emigrant Trail.

Updated June 2026

Kemmerer anchors the western Green River Formation belt, where public-land outcrops and gravels can yield chert, chalcedony, jasper, silicified wood, and fossiliferous lapidary stone. It is included separately from the paid fossil-fish quarries because the best free collecting value is common lapidary material on verified public parcels, not commercial quarry access. Reported finds include turritella agate, chalcedony, chert, jasper, quartz, and more. Below: coordinates, access notes, nearby spots, and trip-planning links.

Kemmerer photos

Public image records connected to this spot or its reported material.

4 photos

Quick details

Access: Public area
County: Lincoln County
State: Wyoming
Nearest road: Emigrant Trail
Coordinates: 41.81137, -110.47798

Geology at Kemmerer

This spot sits on ground mapped as Secondary-stream alluvium that formed within roughly the last 129,000 years. Petrified wood typically travels as tough float, and worked gravels like these are exactly where weathered pieces tend to collect.

Mapped unit: Secondary-stream alluvium
Age: < 1 Ma (Late Pleistocene to Holocene)
Elevation: 7,130 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 Kemmerer

Best months: April to October. Typical highs run 82°F in midsummer and 30°F in midwinter, with winter lows near 2°F. At about 7,130 ft, snow can block access from late fall well into spring, so check conditions outside of summer.

Climate normals: NOAA 1991-2020 monthlies, KEMMERER 2N station (3 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 Kemmerer

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 Kemmerer.

Across the state line from Kemmerer

Kemmerer 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.

Kemmerer FAQ

Where is Kemmerer?+

Kemmerer is in Lincoln County, Wyoming, at 41.81137, -110.47798. Nearest road: Emigrant Trail.

What rocks and minerals can you find at Kemmerer?+

Kemmerer is reported to produce Turritella Agate, Chalcedony, Chert, Jasper, Quartz, Petrified Wood, Silicified Wood.

Is collecting allowed at Kemmerer?+

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 Kemmerer?+

A rock hammer, sturdy gloves, and a padded bag cover petrified wood hunting. Most pieces are surface float, so walking slopes and washes beats digging.

When is the best time to visit Kemmerer?+

The most comfortable months at Kemmerer are April to October. At about 7,130 ft, snow can block access from late fall well into spring, so check conditions outside of summer.

How do I get to Kemmerer?+

Open the directions link to navigate to 41.81137, -110.47798 in Google Maps. The nearest road is Emigrant Trail.

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