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Lander: Agate & Jasper Rockhounding in Fremont County, Wyoming

Public access3 mineralsFremont County, WyomingUpdated June 2026
Minerals reported
3
Elevation
5,750 ft
Best months
March to October

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.

Plan your visit

Generally open to casual rockhounding

State
Wyoming
Nearest road
Squaw Creek Road
Get directionsView 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.

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 Lander

Comfortable months (45 to 90°F highs)

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.

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.

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:

Found at Lander

Each name 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.

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