Lander: Agate & Jasper Rockhounding in Fremont County, Wyoming

Updated June 2026

Lander is a mapped rockhounding spot in Fremont County, Wyoming. Reported finds include agate, jasper, nephrite. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Fremont County
State: Wyoming
Nearest road: Squaw Creek Road
Coordinates: 42.82343, -108.79258

Geology at Lander

This spot sits on ground mapped as Sundance Formation that formed roughly 160 to 145 million years ago. Tough silica like agate and jasper typically survives weathering and collects as float in drainages and gravel.

Mapped unit: Sundance Formation
Age: 160–145 Ma (Late Jurassic)
Elevation: 5,750 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 Lander

Best months: March to October. Typical highs run 87°F in midsummer and 32°F in midwinter, with winter lows near 9°F.

Climate normals: NOAA 1991-2020 monthlies, LANDER AP station (3 mi away), adjusted for elevation.

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: April 1, 2026

BLM Wyoming
Wyoming State Geological Survey
Fossil Butte National Monument
Community submissions reviewed against published agency rules

Found at Lander

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 Lander.

Lander FAQ

Where is Lander?+

Lander is in Fremont County, Wyoming, at 42.82343, -108.79258. Nearest road: Squaw Creek Road.

What rocks and minerals can you find at Lander?+

Lander is reported to produce Agate, Jasper, Nephrite.

Is collecting allowed at Lander?+

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 Lander?+

Most agate and jasper is surface float: bring a spray bottle, a pick or small shovel, and a sturdy bag. Wet stones show their banding and translucence.

When is the best time to visit Lander?+

The most comfortable months at Lander are March to October.

How do I get to Lander?+

Open the directions link to navigate to 42.82343, -108.79258 in Google Maps. The nearest road is Squaw Creek Road.

More rockhounding in Wyoming

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Open Lander on the map

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