Esrey Park: Granite & Prehnite Rockhounding in Keweenaw County, Michigan

Updated August 2026

Esrey Park is a mapped rockhounding spot in Keweenaw County, Michigan. Reported finds include granite, prehnite, copper, agate nodule. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Keweenaw County
State: Michigan
Nearest road: M 26
Coordinates: 47.46864, -88.05672

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

Michigan DNR, Rockhounding rules
Michigan Geological Survey
Isle Royale National Park, Rules
Community submissions reviewed against published agency rules

Found at Esrey Park

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 Esrey Park.

Across the state line from Esrey Park

Esrey Park is close enough to the Michigan border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.

Pigeon PointCook County, Minnesota · 76 mi awayChalcocite, Chalcopyrite, Pyrite

Esrey Park FAQ

Where is Esrey Park?+

Esrey Park is in Keweenaw County, Michigan, at 47.46864, -88.05672. Nearest road: M 26.

What rocks and minerals can you find at Esrey Park?+

Esrey Park is reported to produce Granite, Prehnite, Copper, Agate Nodule.

Is collecting allowed at Esrey Park?+

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 Esrey Park?+

Most agate and jasper is surface float: bring a spray bottle, a pick or small shovel, and a sturdy bag. Wet stones show their banding and translucence.

How do I get to Esrey Park?+

Open the directions link to navigate to 47.46864, -88.05672 in Google Maps. The nearest road is M 26.

More rockhounding in Michigan

See all 119 Michigan spots →

Open Esrey Park on the map

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