Where to Find Silicified Wood in Wyoming
Wyoming has 10 mapped collecting spots that report silicified wood, spread across 5 counties. The largest share sits in Sweetwater County with 6 spots. 9 of the spots are on land mapped as publicly accessible.
Spot list checked against source data on April 1, 2026.
Every silicified wood spot we track in Wyoming
Best spotKemmererLincoln County, WyomingPublic access · Turritella Agate, Chalcedony, Chert +4
Best spotWarm SpringsFremont County, WyomingPublic access · Agate, Chalcedony, Jasper +4
Best spotEden ValleySweetwater County, WyomingPublic access · Silicified Wood
Sweetwater CountySweetwater County, WyomingPublic access · Agate, Chalcedony, Chert +5
FarsonSweetwater County, WyomingPublic access · Agate, Chalcedony, Chert +3
Red DesertSweetwater County, WyomingPublic access · Agate, Chalcedony, Chert +3
Rock SpringsSweetwater County, WyomingPublic access · Agate, Chalcedony, Chert +3
Green RiverSweetwater County, WyomingPublic access · Agate, Chalcedony, Jasper +1
Thorofare WildernessTeton County, WyomingPermission required · Agate, Jasper, Opalized Wood +1
Crazy Woman CreekJohnson County, WyomingPublic access · Opalized Wood, Silicified Wood
Standout silicified wood spots in Wyoming
Hand-picked from the full list above, with the reason each one earns a trip.
Warm Springs
Fremont County
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.
Kemmerer
Lincoln County
Kemmerer anchors the western Green River Formation belt, where public-land outcrops and gravels can yield chert, chalcedony, jasper, silicified wood, and fossiliferous lapidary stone.
Eden Valley
Sweetwater County
Eden Valley is the Wyoming benchmark for silicified and agatized wood, with Mindat records tying petrified wood to Eden Valley and the Blue Forest area.
Best counties for silicified wood in Wyoming
Ranked by the number of mapped silicified wood spots. County links open the full rockhounding page for that county.
- Sweetwater County6 spots
- Fremont County1 spot
- Johnson County1 spot
- Lincoln County1 spot
- Teton County1 spot
Before you go
Read the silicified wood identification guide so you know what a keeper looks like in the field: Silicified Wood in the encyclopedia.
