Custer County — Rockhounding in Custer County, Montana

Custer County is a mapped rockhounding spot in Custer County, Montana. Reported finds include montana agate. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Custer County
State: Montana
Postcode: 59301
Coordinates: 46.39627, -105.89810

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.

Found at Custer County

Each chip links to all spots in the U.S. that produce that material.

Montana Agate

Nearby rockhounding spots

Other rockhounding spots within driving distance of Custer County.

Custer County FAQ

Where is Custer County?+

Custer County is in Custer County, Montana, at 46.39627, -105.89810.

What rocks and minerals can you find at Custer County?+

Custer County is reported to produce Montana Agate.

Is collecting allowed at Custer County?+

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.

How do I get to Custer County?+

Open the directions link to navigate to 46.39627, -105.89810 in Google Maps. Some spots are remote — check road conditions before driving out.

More rockhounding in Montana

See all 87 Montana spots →

Open Custer County on the map

Use the RockHoundR app for live land overlays, weather, geology, directions, and saved finds.