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Keweenaw Point: Keweenaw Agate & Thomsonite Rockhounding in Keweenaw County, Michigan

Updated June 2026

The exposed Lake Shore Traps along the wave-washed tip of the Keweenaw Peninsula carry agate-filled amygdules and datolite, with larger Keweenaw agates working loose from a narrow gravel band at the waterline. The State of Michigan and The Nature Conservancy secured public access to roughly 6,275 acres here in 2003, keeping the Point open for shoreline collecting. Thomsonite and chalcedony round out the finds. Reported finds include keweenaw agate, thomsonite, datolite, chalcedony, jasper. Below: coordinates, access notes, nearby spots, and trip-planning links.

Keweenaw Point photos

Public image records connected to this spot or its reported material.

1 photo

A polished Copper Country datolite nodule, the porcelain-like mineral found around Keweenaw Point

Quick details

Access: Public area
County: Keweenaw County
State: Michigan
Postcode: 49918
Coordinates: 47.40792, -87.71151

Best time to visit Keweenaw Point

Best months: May to October. Typical highs run 73°F in midsummer and 23°F in midwinter, with winter lows near 11°F.

Climate normals: NOAA 1991-2020 monthlies, COPPER HARBOR FT WILKINS station (8 mi away).

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 Keweenaw Point

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 Keweenaw Point.

Keweenaw Point FAQ

Where is Keweenaw Point?+

Keweenaw Point is in Keweenaw County, Michigan, at 47.40792, -87.71151.

What rocks and minerals can you find at Keweenaw Point?+

Keweenaw Point is reported to produce Keweenaw Agate, Thomsonite, Datolite, Chalcedony, Jasper.

Is collecting allowed at Keweenaw Point?+

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 Keweenaw Point?+

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.

When is the best time to visit Keweenaw Point?+

The most comfortable months at Keweenaw Point are May to October.

How do I get to Keweenaw Point?+

Open the directions link to navigate to 47.40792, -87.71151 in Google Maps. Some spots are remote, so check road conditions before driving out.

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