Baggs: Coffinite & Ilsemannite Rockhounding in Carbon County, Wyoming

Plan your visit

Permission required before collecting

County

Carbon County

State

Wyoming

Nearest road

WY 789

Coordinates

41.08940, -107.59371

Coordinates are approximate. Confirm the exact ground in the RockHoundR app, where land overlays show which agency manages the area.

Land & collecting status

Permission required before collecting

Requires landowner or agency permission before any collecting. Do not enter without explicit authorization.

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.

Best time to visit Baggs

Comfortable months (45 to 90°F highs)

Best months: March to October. Typical highs run 86°F in midsummer and 31°F in midwinter, with winter lows near 6°F.

Climate normals: NOAA 1991-2020 monthlies, BAGGS station (5 mi away), adjusted for elevation.

Geology at Baggs

This spot sits on ground mapped as Red Rim Member of the Lance Formation that formed roughly 100 to 66 million years ago. Ore minerals here are typically tied to veins and replacement zones, with old workings marking the productive ground.

Mapped unit

Red Rim Member of the Lance Formation

Age

100–66 Ma (Late Cretaceous)

Elevation

6,560 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.

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