Portsmouth Mine — Rockhounding in Crow Wing County, Minnesota

Portsmouth Mine is a mapped rockhounding spot in Crow Wing County, Minnesota. Reported finds include agates, chalcedony, jasper, binghamite, manganese, and more. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Crow Wing County
State: Minnesota
Nearest road: Portsmouth Campground Trail
Postcode: 56441
Coordinates: 46.49079, -93.97144

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 Portsmouth Mine

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

Agates
Chalcedony
Jasper
Binghamite
Manganese
Iron

Nearby rockhounding spots

Other rockhounding spots within driving distance of Portsmouth Mine.

Portsmouth Mine FAQ

Where is Portsmouth Mine?+

Portsmouth Mine is in Crow Wing County, Minnesota, at 46.49079, -93.97144. Nearest road: Portsmouth Campground Trail.

What rocks and minerals can you find at Portsmouth Mine?+

Portsmouth Mine is reported to produce Agates, Chalcedony, Jasper, Binghamite, Manganese, Iron.

Is collecting allowed at Portsmouth Mine?+

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 Portsmouth Mine?+

Open the directions link to navigate to 46.49079, -93.97144 in Google Maps. The nearest road is Portsmouth Campground Trail.

More rockhounding in Minnesota

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Open Portsmouth Mine on the map

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