Warm Springs: Agate & Chalcedony Rockhounding in Fremont County, Wyoming

Public accessBest spot7 mineralsFremont County, WyomingUpdated June 2026

4 photos

Minerals reported: 7
Elevation: 6,630 ft
Best months: April to October

Warm Springs is a strong Granite Mountains-area pick because it combines Wyoming jade targets with agate, jasper, chalcedony, quartz, and silicified wood in one public-land collecting corridor. WSGS identifies jade as Wyoming's best-known gemstone and also lists agate, petrified wood, and quartz crystals among the state's important collector materials. Reported finds include agate, chalcedony, jasper, jade, nephrite jade, and more. Below: coordinates, access notes, nearby spots, and trip-planning links.

Plan your visit

Generally open to casual rockhounding

County: Fremont County
State: Wyoming
Nearest road: Emigrant Trail
Coordinates: 42.49083, -108.17210

Get directions View on Google Maps

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.

Access note: Use BLM surface-management maps around the Warm Springs and Granite Mountains area because public parcels, private land, and unpatented claims are interspersed.

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 Warm Springs

30°J

33°F

43°M

53°A

63°M

75°J

84°J

82°A

72°S

57°O

41°N

30°D

Comfortable months (45 to 90°F highs)

Best months: April to October. Typical highs run 84°F in midsummer and 30°F in midwinter, with winter lows near 8°F.

Climate normals: NOAA 1991-2020 monthlies, JEFFREY CITY station (18 mi away), adjusted for elevation.

Geology at Warm Springs

This spot sits on ground mapped as sandstone that formed roughly 23 to 5 million years ago. Tough silica like agate, jasper, and chert typically weathers out of beds like these and collects as float in drainages and on deflation surfaces.

Age: 23–5 Ma (Miocene)
Rock types: sandstone
Elevation: 6,630 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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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 Warm Springs

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 Warm Springs.

SweetwaterFremont County, Wyoming · 5 mi awaySweetwater Agate
Granite Mountains PegmatitesFremont County, Wyoming · 19 mi awayAlmandine Garnet, Beryl, Black Tourmaline
Green MountainFremont County, Wyoming · 25 mi awayBanded Agate, Moss Agate, Aventurine
Atlantic CityFremont County, Wyoming · 28 mi awayAgate, Chalcedony, Gold
South Pass CityFremont County, Wyoming · 30 mi awayGold
Sage Hen CreekFremont County, Wyoming · 31 mi awayAgate, Chalcedony, Jasper
Split RockNatrona County, Wyoming · 33 mi awayRuby
Fremont CountyFremont County, Wyoming · 35 mi awaySweetwater Agate, Nephrite Jade, Jade

Warm Springs FAQ

Where is Warm Springs?+

Warm Springs is in Fremont County, Wyoming, at 42.49083, -108.17210. Nearest road: Emigrant Trail.

What rocks and minerals can you find at Warm Springs?+

Warm Springs is reported to produce Agate, Chalcedony, Jasper, Jade, Nephrite Jade, Quartz, Silicified Wood.

Is collecting allowed at Warm Springs?+

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 Warm Springs?+

Most agate and jasper is surface float: bring a spray bottle, a pick or small shovel, and a sturdy bag. Wet stones show their banding and translucence.

When is the best time to visit Warm Springs?+

The most comfortable months at Warm Springs are April to October.

How do I get to Warm Springs?+

Open the directions link to navigate to 42.49083, -108.17210 in Google Maps. The nearest road is Emigrant Trail.

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