Grand Marais — Rockhounding in Cook County, Minnesota

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

Quick details

Access: Public area
County: Cook County
State: Minnesota
Nearest road: Harbor View Trail
Coordinates: 47.74462, -90.35314

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 Grand Marais

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

Lintonite
Thomsonite

Nearby rockhounding spots

Other rockhounding spots within driving distance of Grand Marais.

Grand Marais FAQ

Where is Grand Marais?+

Grand Marais is in Cook County, Minnesota, at 47.74462, -90.35314. Nearest road: Harbor View Trail.

What rocks and minerals can you find at Grand Marais?+

Grand Marais is reported to produce Lintonite, Thomsonite.

Is collecting allowed at Grand Marais?+

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 Grand Marais?+

Open the directions link to navigate to 47.74462, -90.35314 in Google Maps. The nearest road is Harbor View Trail.

More rockhounding in Minnesota

See all 49 Minnesota spots →

Open Grand Marais on the map

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