Bitter Creek: Tschermigite Rockhounding in Sweetwater County, Wyoming

Updated June 2026

Bitter Creek is a mapped rockhounding spot in Sweetwater County, Wyoming. Reported finds include tschermigite. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Sweetwater County
State: Wyoming
Nearest road: Bitter Creek Road
Coordinates: 41.54432, -108.54639

Geology at Bitter Creek

This spot sits on Alluvium and Colluvium, mapped as clay, silt, and sand that formed within roughly the last 3 million years. Loose deposits like these are float-collecting ground: erosion keeps moving durable rocks and minerals into gravel bars, cutbanks, and washes.

Mapped unit: Alluvium and Colluvium
Age: 3 Ma to present (Pleistocene to Holocene)
Rock types: clay, silt, and sand
Elevation: 6,710 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 Bitter Creek

Best months: March to October. Typical highs run 86°F in midsummer and 33°F in midwinter, with winter lows near 11°F.

Climate normals: NOAA 1991-2020 monthlies, BITTER CREEK 4 NE station (4 mi away).

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 Bitter Creek

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

Tschermigite

Nearby rockhounding spots

Other rockhounding spots within driving distance of Bitter Creek.

Across the state line from Bitter Creek

Bitter Creek 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.

Bitter Creek FAQ

Where is Bitter Creek?+

Bitter Creek is in Sweetwater County, Wyoming, at 41.54432, -108.54639. Nearest road: Bitter Creek Road.

What rocks and minerals can you find at Bitter Creek?+

Bitter Creek is reported to produce Tschermigite.

Is collecting allowed at Bitter Creek?+

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 Bitter Creek?+

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 Bitter Creek?+

The most comfortable months at Bitter Creek are March to October.

How do I get to Bitter Creek?+

Open the directions link to navigate to 41.54432, -108.54639 in Google Maps. The nearest road is Bitter Creek Road.

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Open Bitter Creek on the map

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