Best Rockhounding in Keweenaw County, MI (14 Spots)

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 pick
Keweenaw Point
Public
Keweenaw 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 pick
Manitou Island
Public
Keweenaw 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	Agate Nodule Carnelian Quartz	47.9047, -89.0038	Permission
Central MineUS 41	Copper Chlorastrolite	47.4050, -88.1957	Permission
Cliff Mine	Copper Calcite Chlorite Epidote Laumontite Prehnite Isle Royale Greenstone	47.3729, -88.3131	Check locally
Cliff North	Copper Calcite Chlorite Epidote Laumontite Prehnite Isle Royale Greenstone Azurite	47.3764, -88.3158	Check locally
Esrey ParkM 26	Granite Prehnite Copper Agate Nodule	47.4686, -88.0567	Public
Gratiot River County Park	Freda Sandstone Basalt Rhyolite Unakite Granite Lake Superior Agate Prehnite Mesolite	47.3437, -88.4525	Public
High Rock Bay	Prehnite Calcite Copper Epidote Lake Superior Agate Datolite Isle Royale Greenstone	47.4233, -87.7152	Public
Iroquois MineCliff Drive	Native Copper	47.3246, -88.3633	Permission
Keweenaw Point	Keweenaw Agate Thomsonite Datolite Chalcedony Jasper	47.4079, -87.7115	Public
Keweenaw Rocket RangeRocket Range Road	Granite Prehnite Copper Agate Nodule	47.4303, -87.7147	Public
Manitou Island	Lake Superior Agate Quartz	47.4150, -87.6279	Public
Seneca No. 1 ShaftSeneca Road	Copper Datolite Prehnite	47.3113, -88.3622	Permission
Siskiwit Lake (South Side)Ishpeming Trail	Chlorastrolite	47.9887, -88.8074	Permission
Tobin Harbor AreaStoll Trail	Agate Carnelian Quartz	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.

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.

Cook County~89 miMinnesota · 4 spotsTop: Lintonite, Chalcocite, Chalcopyrite

Keweenaw County FAQ

Where can I rockhound in Keweenaw County, Michigan?+

RockHoundR tracks 14 rockhounding spots in Keweenaw County. Each entry below has coordinates, mineral notes, and access type. Always confirm local rules before collecting.

What rocks and minerals are common in Keweenaw County?+

Spots in Keweenaw County most often produce Copper, Prehnite, Agate Nodule, Calcite, Datolite. Individual spots can vary widely.

Are these Keweenaw County rockhounding spots on public land?+

Most spots in this list are tagged public, but access can change with seasons, claims, and local closures. Always verify before driving out, links in the app open the right BLM, USFS, or county pages.

Plan a Keweenaw County rockhounding trip

Open RockHoundR to see these spots on the map alongside land overlays, weather, geology, and your saved finds.

Rockhounding in Keweenaw County, Michigan

Keweenaw County rockhounding photos

Minerals reported in Keweenaw County