Newcastle: Gypsum Rockhounding in Weston County, Wyoming
Updated June 2026
Newcastle is a mapped rockhounding spot in Weston County, Wyoming. Reported finds include gypsum. Below: coordinates, access notes, nearby spots, and trip-planning links.
Map showing Newcastle in Weston County, Wyoming
Quick details
- Access
- Public area
- County
- Weston County
- State
- Wyoming
- Nearest road
- Beaver Creek Road
- Coordinates
- 43.81883, -104.11007
Geology at Newcastle
This spot sits on ground mapped as Alluvial deposits 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
- Alluvial deposits
- Age
- 3 Ma to present (Pleistocene to Holocene)
- Elevation
- 4,360 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 Newcastle
Best months: March to November. Typical highs run 87°F in midsummer and 35°F in midwinter, with winter lows near 14°F.
Climate normals: NOAA 1991-2020 monthlies, NEWCASTLE 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:
- BLM Wyoming
- Wyoming State Geological Survey
- Fossil Butte National Monument
- Community submissions reviewed against published agency rules
Found at Newcastle
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 Newcastle.
- Black Hills National ForestCrook County, Wyoming · 38 mi awayFluorite, Gold
- Warren PeakCrook County, Wyoming · 48 mi awayAzurite, Malachite
- Copper Prince MineCrook County, Wyoming · 50 mi awayChrysocolla, Gold, Malachite
- Rawhide ButtesGoshen County, Wyoming · 87 mi awayAzurite, Bornite, Chalcocite
- Jay EmGoshen County, Wyoming · 94 mi awayAgate, Malachite, Onyx
- SunrisePlatte County, Wyoming · 107 mi awayArsenopyrite, Barite, Copper
- HartvilleTop pick in WyomingPlatte County, Wyoming · 108 mi awayAgate, Moss Agate, Chalcedony
- Box Elder CanyonConverse County, Wyoming · 111 mi awayGeode, Quartz
Across the state line from Newcastle
Newcastle 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.
- Hell CanyonCuster County, South Dakota · 14 mi awayBanded Agate, Jade, Jasper
- Tin MountainCuster County, South Dakota · 20 mi awayFluorapatite, Quartz, Almandine Garnet
- Tepee CanyonTop pick in South DakotaCuster County, South Dakota · 20 mi awayAgate, Beryl, Almandine Garnet
- Laughing Water CreekCuster County, South Dakota · 25 mi awayColumbite, Gold, Silver
- RochfordPennington County, South Dakota · 26 mi awayArsenopyrite, Galena, Gold
- Pleasant Valley CreekCuster County, South Dakota · 27 mi awayBanded Agate, Jade, Jasper
Newcastle FAQ
Where is Newcastle?+
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More rockhounding in Wyoming
See all 82 Wyoming spots →Open Newcastle on the map
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