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Eden Valley: Silicified Wood Rockhounding in Sweetwater County, Wyoming

Updated June 2026

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.

Eden Valley photos

Public image records connected to this spot or its reported material.

1 photo

Map showing Eden Valley in Sweetwater County, Wyoming

Quick details

Access
Public area
State
Wyoming
Postcode
82932

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.

Best time to visit Eden Valley

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).

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:

Found at Eden Valley

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 Eden Valley.

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.

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.

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