Seneca No. 1 Shaft: Copper & Datolite Rockhounding in Keweenaw County, Michigan

Updated August 2026

Seneca No. 1 Shaft is a mapped rockhounding spot in Keweenaw County, Michigan. Reported finds include copper, datolite, prehnite. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Permission required
County: Keweenaw County
State: Michigan
Nearest road: Seneca Road
Postcode: 49950
Coordinates: 47.31132, -88.36219

Land & collecting status

Permission required before collecting

Requires landowner or agency permission before any collecting. Do not enter without explicit authorization.

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 Seneca No. 1 Shaft

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 Seneca No. 1 Shaft.

Across the state line from Seneca No. 1 Shaft

Seneca No. 1 Shaft 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 · 71 mi awayChalcocite, Chalcopyrite, Pyrite

Seneca No. 1 Shaft FAQ

Where is Seneca No. 1 Shaft?+

Seneca No. 1 Shaft is in Keweenaw County, Michigan, at 47.31132, -88.36219. Nearest road: Seneca Road.

What rocks and minerals can you find at Seneca No. 1 Shaft?+

Seneca No. 1 Shaft is reported to produce Copper, Datolite, Prehnite.

Is collecting allowed at Seneca No. 1 Shaft?+

Permission required before collecting. Requires landowner or agency permission before any collecting. Do not enter without explicit authorization. Always confirm current rules with the managing agency before a trip.

What tools should I bring to Seneca No. 1 Shaft?+

A rock hammer, gloves, and safety glasses are enough for oxidized copper ground. Look for green and blue staining on weathered rock and in old dump piles.

How do I get to Seneca No. 1 Shaft?+

Open the directions link to navigate to 47.31132, -88.36219 in Google Maps. The nearest road is Seneca Road.

More rockhounding in Michigan

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Open Seneca No. 1 Shaft on the map

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