Thomsonite Beach — Rockhounding in Cook County, Minnesota

Thomsonite Beach is a mapped rockhounding spot in Cook County, Minnesota. Reported finds include chlorastrolite, lintonite, thomsonite nodules. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Cook County
State: Minnesota
Nearest road: MN 61
Coordinates: 47.72778, -90.45836

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 Thomsonite Beach

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

Chlorastrolite
Lintonite
Thomsonite Nodules

Nearby rockhounding spots

Other rockhounding spots within driving distance of Thomsonite Beach.

Thomsonite Beach FAQ

Where is Thomsonite Beach?+

Thomsonite Beach is in Cook County, Minnesota, at 47.72778, -90.45836. Nearest road: MN 61.

What rocks and minerals can you find at Thomsonite Beach?+

Thomsonite Beach is reported to produce Chlorastrolite, Lintonite, Thomsonite Nodules.

Is collecting allowed at Thomsonite Beach?+

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 Thomsonite Beach?+

Open the directions link to navigate to 47.72778, -90.45836 in Google Maps. The nearest road is MN 61.

More rockhounding in Minnesota

See all 49 Minnesota spots →

Open Thomsonite Beach on the map

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