Eden Valley: Silicified Wood Rockhounding in Sweetwater County, Wyoming

Public accessBest spot1 mineralSweetwater County, WyomingUpdated June 2026

Mineral reported: 1
Elevation: 6,540 ft
Best months: April to October

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. It also has unusually clear legal framing, since BLM specifically allows limited personal-use petrified wood collecting on open public land while keeping fossil and commercial-use rules separate. Reported finds include silicified wood. Below: coordinates, access notes, nearby spots, and trip-planning links.

Plan your visit

Generally open to casual rockhounding

County: Sweetwater County
State: Wyoming
Postcode: 82932
Coordinates: 42.02912, -109.54051

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: Petrified wood may be collected only in personal-use quantities on open BLM land; vertebrate fossils and scientifically significant fossils are not casual-collecting material.

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 Eden Valley

28°J

30°F

43°M

54°A

64°M

74°J

83°J

81°A

71°S

57°O

41°N

30°D

Comfortable months (45 to 90°F highs)

Best months: April to October. Typical highs run 83°F in midsummer and 28°F in midwinter, with winter lows near -4°F.

Climate normals: NOAA 1991-2020 monthlies, FARSON 2NNE station (9 mi away).

Geology at Eden Valley

This spot sits on ground mapped as Laney Shale Member of Green River Formation that formed roughly 56 to 34 million years ago. Sedimentary beds like these are the typical host for petrified and silicified wood, which weathers out as durable float on slopes and in washes.

Mapped unit: Laney Shale Member of Green River Formation
Age: 56–34 Ma (Eocene)
Elevation: 6,540 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 Eden Valley

Each name opens all spots that produce that material; the encyclopedia link opens the full ID and field guide.

Silicified Wood Encyclopedia →

Nearby rockhounding spots

Other rockhounding spots within driving distance of Eden Valley.

Eden ValleySweetwater County, Wyoming · 7 mi awayPetrified Wood
FarsonSweetwater County, Wyoming · 11 mi awayAgate, Chalcedony, Chert
Blue ForestSweetwater County, Wyoming · 19 mi awayPetrified Wood
Steamboat MountainSweetwater County, Wyoming · 30 mi awayAgate, Chalcedony, Jasper
Sweetwater CountySweetwater County, Wyoming · 34 mi awayAgate, Chalcedony, Chert
Rock SpringsSweetwater County, Wyoming · 35 mi awayAgate, Chalcedony, Chert
Green RiverSweetwater County, Wyoming · 36 mi awayAgate, Chalcedony, Jasper
GrangerSweetwater County, Wyoming · 38 mi awayTurritella Agate

Across the state line from Eden Valley

Eden Valley is close enough to the Wyoming border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.

Yellow Canary Uranium DepositDaggett County, Utah · 79 mi awayAzurite, Bornite, Brochantite

Eden Valley FAQ

Where is Eden Valley?+

Eden Valley is in Sweetwater County, Wyoming, at 42.02912, -109.54051.

What rocks and minerals can you find at Eden Valley?+

Eden Valley is reported to produce Silicified Wood.

Is collecting allowed at Eden Valley?+

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 Eden Valley?+

A rock hammer, sturdy gloves, and a padded bag cover petrified wood hunting. Most pieces are surface float, so walking slopes and washes beats digging.

When is the best time to visit Eden Valley?+

The most comfortable months at Eden Valley are April to October.

How do I get to Eden Valley?+

Open the directions link to navigate to 42.02912, -109.54051 in Google Maps. Some spots are remote, so check road conditions before driving out.