Rockhounding in Keweenaw County, Michigan
9 mapped rockhounding spots in Keweenaw County. Most commonly produces prehnite, calcite, copper, epidote.
Keweenaw County rockhounding photos
Representative spot and material photos from this county, shown where verified public image records are available.
Map showing 9 rockhounding spots in Keweenaw County, Michigan
Minerals reported in Keweenaw County
Standouts in Keweenaw County
Hand-picked spots in Keweenaw County, chosen for unusual mineralogy or documented public access. Each card opens the full coordinates and access notes.
Top pickKeweenaw Point
PublicKeweenaw County
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.
Keweenaw Agate, Thomsonite, Datolite, Chalcedony
Top pickManitou Island
PublicKeweenaw County
The 93-acre Manitou Island Light Station Preserve, owned by the Keweenaw Land Trust off the tip of the Keweenaw, is one of the few outer-island shores expressly open to the public for rock collecting.
Lake Superior Agate, Quartz
Spots in Keweenaw County
| Spot | Minerals | Coordinates | Access |
|---|---|---|---|
| Carnelian beachIsland Mine Trail | 47.9047, -89.0038 | Permission | |
| Cliff Mine | 47.3729, -88.3131 | Check locally | |
| Cliff North | 47.3764, -88.3158 | Check locally | |
| Gratiot River County Park | 47.3437, -88.4525 | Public | |
| High Rock Bay | 47.4233, -87.7152 | Public | |
| Keweenaw Point | 47.4079, -87.7115 | Public | |
| Manitou Island | 47.4150, -87.6279 | Public | |
| Siskiwit Lake (South Side)Ishpeming Trail | 47.9887, -88.8074 | Permission | |
| Tobin Harbor AreaStoll Trail | 48.1654, -88.4635 | Permission |
Neighboring counties in Michigan
Adjacent rockhounding counties, ranked by how close their centroids sit to Keweenaw County. A natural extension if Keweenaw County is already on your trip plan.
- Houghton County~34 mi4 spotsTop: Lake Superior Agate, Chert, Prehnite
- Marquette County~77 mi6 spotsTop: Hematite, Chalcopyrite, Jaspilite
- Ontonagon County~78 mi4 spotsTop: Keweenaw Agate, Chalcedony, Charlevoix Stone
- Alger County~116 mi2 spotsTop: Banded Iron Formation, Lake Superior Agate, Yooperlite
- Luce County~143 mi5 spotsTop: Lake Superior Agate, Chert, Granite
Across the state line from Keweenaw County
Rockhounding counties in neighboring states within driving range. Geology rarely respects state borders — these are often the closest mapped spots you can reach without going deeper into Michigan.
Keweenaw County FAQ
Where can I rockhound in Keweenaw County, Michigan?+
What rocks and minerals are common in Keweenaw County?+
Are these Keweenaw County rockhounding spots on public land?+
Plan a Keweenaw County rockhounding trip
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