Sweetwater River — Rockhounding in Fremont County, Wyoming
Sweetwater agate is Wyoming's signature agate, and the Sweetwater River drainage is the classic field area tied to the Granite Mountains source terrain. WSGS publications describe Sweetwater material among the state's better-known agates, while BLM rules make casual surface collecting possible on open public parcels when claims and ownership are checked first. Reported finds include agate. Below: coordinates, access notes, nearby spots, and trip-planning links.
Sweetwater River photos
Public image records connected to this spot or its reported material, with source and license attribution.
Map showing Sweetwater River in Fremont County, Wyoming
Quick details
- Access
- Public area
- County
- Fremont County
- State
- Wyoming
- Coordinates
- 42.44731, -108.99584
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 Sweetwater River
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 Sweetwater River.
- Fremont CountyFremont County, Wyoming · 7 mi awayAgate, Chalcedony, Jasper
- South Pass CityFremont County, Wyoming · 12 mi awayGold
- Atlantic CityTop pick in WyomingFremont County, Wyoming · 14 mi awayAgate, Chalcedony, Gold
- LanderFremont County, Wyoming · 28 mi awayAgate, Jasper, Nephrite
- FarsonSweetwater County, Wyoming · 29 mi awayAgate, Chalcedony, Chert
- Steamboat MountainSweetwater County, Wyoming · 34 mi awayAgate, Chalcedony, Jasper
- Eden ValleyTop pick in WyomingSweetwater County, Wyoming · 40 mi awaySilicified Wood
- Warm SpringsTop pick in WyomingFremont County, Wyoming · 42 mi awayAgate, Chalcedony, Jasper
Sweetwater River FAQ
Why is Sweetwater River one of the best rockhounding spots in Wyoming?+
Where is Sweetwater River?+
What rocks and minerals can you find at Sweetwater River?+
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More rockhounding in Wyoming
See all 82 Wyoming spots →Open Sweetwater River on the map
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