Casper: Agate & Alabaster Rockhounding in Natrona County, Wyoming
- Minerals reported
- 3
- Elevation
- 5,100 ft
- Best months
- March to November
Casper is a mapped rockhounding spot in Natrona County, Wyoming. Reported finds include agate, alabaster, amazonite. Below: coordinates, access notes, nearby spots, and trip-planning links.
Plan your visit
Generally open to casual rockhounding
- County
- Natrona County
- State
- Wyoming
- Nearest road
- Bryan-Evansville Road
- Postcode
- 82605
- Coordinates
- 42.86227, -106.28537
Coordinates are approximate. Confirm the exact ground in the RockHoundR app, where land overlays show which agency manages the area.
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.
Best time to visit Casper
Comfortable months (45 to 90°F highs)
Best months: March to November. Typical highs run 88°F in midsummer and 38°F in midwinter, with winter lows near 16°F.
Climate normals: NOAA 1991-2020 monthlies, CASPER WWTP station (0 mi away).
Geology at Casper
This spot sits on ground mapped as Alluvial deposits that formed within roughly the last 12,000 years. Gravels like these concentrate whatever survives the river: agate, jasper, and other tough silica typically show up as rounded, waxy stones.
- Mapped unit
- Alluvial deposits
- Age
- < 1 Ma (Holocene)
- Elevation
- 5,100 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.
Today's weather
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The app shows live weather, recent rain, and a daily rockhounding score for Casper.
Get the appSources & 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 Casper
Each name 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 Casper.
- CasperNatrona County, Wyoming · 10 mi awayBeryl, Muscovite, Tourmaline
- Poison Spider CreekNatrona County, Wyoming · 14 mi awayAgate, Chalcedony, Jasper
- Deer Creek Canyon MineConverse County, Wyoming · 18 mi awayChromite
- Box Elder CanyonConverse County, Wyoming · 27 mi awayGeode, Quartz
- Moss Agate HillConverse County, Wyoming · 34 mi awayMoss Agate, Chalcedony, Jasper
- Converse CountyConverse County, Wyoming · 36 mi awayCopper, Chalcopyrite
- Shirley BasinCarbon County, Wyoming · 37 mi awayOpalized Wood
- Pathfinder ReservoirNatrona County, Wyoming · 45 mi awayBanded Iron Formation
Casper FAQ
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More rockhounding in Wyoming
See all 92 Wyoming spots →
Open Casper on the map
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