Thermopolis — Rockhounding in Fremont County, Wyoming

Thermopolis is a mapped rockhounding spot in Fremont County, Wyoming. Reported finds include copper, limonite. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Fremont County
State: Wyoming
Nearest road: Arapahoe Ranch Road
Coordinates: 43.51100, -108.62583

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 Thermopolis

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 Thermopolis.

Thermopolis FAQ

Where is Thermopolis?+

Thermopolis is in Fremont County, Wyoming, at 43.51100, -108.62583. Nearest road: Arapahoe Ranch Road.

What rocks and minerals can you find at Thermopolis?+

Thermopolis is reported to produce Copper, Limonite.

Is collecting allowed at Thermopolis?+

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.

How do I get to Thermopolis?+

Open the directions link to navigate to 43.51100, -108.62583 in Google Maps. The nearest road is Arapahoe Ranch Road.

More rockhounding in Wyoming

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Open Thermopolis on the map

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