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.

Standout silicified wood spots in Wyoming

Hand-picked from the full list below, 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.

Every silicified wood spot we track in Wyoming

Sorted by county. Coordinates open in Google Maps.

Spot	County	Minerals	Coordinates	Access
Warm SpringsEmigrant Trail	Fremont County	Agate Chalcedony Jasper Jade Nephrite Jade Quartz Silicified Wood	42.4908, -108.1721	Public
Crazy Woman CreekI 90	Johnson County	Opalized Wood Silicified Wood	44.2548, -106.4263	Public
KemmererEmigrant Trail	Lincoln County	Turritella Agate Chalcedony Chert Jasper Quartz Petrified Wood Silicified Wood	41.8114, -110.4780	Public
Eden Valley	Sweetwater County	Silicified Wood	42.0291, -109.5405	Public
Farson	Sweetwater County	Agate Chalcedony Chert Jasper Quartz Silicified Wood	42.1694, -109.4311	Public
Green River	Sweetwater County	Agate Chalcedony Jasper Silicified Wood	41.5167, -109.7124	Public
Red DesertTipton-North Road	Sweetwater County	Agate Chalcedony Chert Jasper Quartz Silicified Wood	41.8194, -108.2799	Public
Rock Springs	Sweetwater County	Agate Chalcedony Chert Jasper Quartz Silicified Wood	41.6163, -109.1605	Public
Sweetwater CountyWY 374	Sweetwater County	Agate Chalcedony Chert Jasper Petrified Wood Silicified Wood Quartz Turritella Agate	41.5388, -109.4846	Public
Thorofare WildernessFox Park-Yellowstone Trail	Teton County	Agate Jasper Opalized Wood Silicified Wood	44.1233, -110.1169	Permission

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.

Silicified Wood in Wyoming FAQ

Where can you find silicified wood in Wyoming?+

The mapped spots concentrate in Sweetwater County, Fremont County, and Johnson County. Every spot on this page appears on the map above with coordinates and access notes.

How many silicified wood spots are mapped in Wyoming?+

10 spots across 5 counties. The RockHoundR app keeps the same spots on an offline map with public land overlays, geology layers, and your saved finds.

Is it legal to collect silicified wood in Wyoming?+

Hand collecting of common rocks and minerals in small amounts for personal use is generally allowed on BLM and U.S. Forest Service land, with limits set by the local field office. National parks, most state parks, and tribal land are closed to collecting. 9 of the 10 mapped spots here sit on land marked public. Always confirm current rules with the managing agency before you dig.

Where else to find silicified wood

North Dakota5 spots

More minerals to hunt in Wyoming

Hunt silicified wood in Wyoming with the map in your pocket

RockHoundR puts these spots on an offline map with BLM and Forest Service overlays, geology layers, and a log for your finds.