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Atlantic City: Gold Prospecting in Fremont County, Wyoming

Updated June 2026

Atlantic City sits in the South Pass country, where Wyoming's gold-mining history overlaps with the central Wyoming jade and agate belt. The mix of quartz, muscovite, tourmaline, jasper, chalcedony, and nephrite makes it a broader hard-rock and float locality than the single-material Sweetwater agate stops nearby. Reported finds include agate, chalcedony, gold, nephrite jade, jade, and more. Below: coordinates, access notes, nearby spots, and trip-planning links.

Atlantic City photos

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

6 photos

Quick details

Access: Public area
County: Fremont County
State: Wyoming
Nearest road: Riverview Cutoff
Coordinates: 42.48946, -108.72754

Geology at Atlantic City

This spot sits on Metasedimentary rocks, mapped as metasedimentary that formed roughly 4030 to 2500 million years ago. Gold in metamorphic belts like this is typically tied to quartz veins and shear zones, with placer color in the creeks that cut them.

Mapped unit: Metasedimentary rocks
Age: 4030–2500 Ma (Archean)
Rock types: metasedimentary
Elevation: 7,830 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 Atlantic City

Best months: April to October. Typical highs run 77°F in midsummer and 29°F in midwinter, with winter lows near 1°F. At about 7,830 ft, snow can block access from late fall well into spring, so check conditions outside of summer.

Climate normals: NOAA 1991-2020 monthlies, ATLANTIC CITY station (0 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 Atlantic City

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 Atlantic City.

Atlantic City FAQ

Where is Atlantic City?+

Atlantic City is in Fremont County, Wyoming, at 42.48946, -108.72754. Nearest road: Riverview Cutoff.

What rocks and minerals can you find at Atlantic City?+

Atlantic City is reported to produce Agate, Chalcedony, Gold, Nephrite Jade, Jade, Jasper, Muscovite, Quartz, Agatized Wood, Opalized Wood, Tourmaline.

Is collecting allowed at Atlantic City?+

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 Atlantic City?+

A gold pan, a classifier screen, a small shovel, and a snuffer bottle cover the basics. Motorized equipment and sluices fall under separate rules in most states, so start with hand tools.

When is the best time to visit Atlantic City?+

The most comfortable months at Atlantic City are April to October. At about 7,830 ft, snow can block access from late fall well into spring, so check conditions outside of summer.

How do I get to Atlantic City?+

Open the directions link to navigate to 42.48946, -108.72754 in Google Maps. The nearest road is Riverview Cutoff.

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