Rockhounding in Alpena County, Michigan

2 mapped rockhounding spots in Alpena County. Most commonly produces brachiopod, horn coral, blastoid, brachiopods.

Alpena County rockhounding photos

Representative spot and material photos from this county, shown where verified public image records are available.

1 photo

A Devonian honeycomb coral (Favosites) fossil in limestone, like the fossils at the Rockport quarry — Rockport Recreation AreaAlpena County, Michigan

Minerals reported in Alpena County

Brachiopod2
Horn Coral2
Blastoid1
Brachiopods1
Bryozoan1
Cladopora1
Crinoid1
Crinoid Stems1

Standout in Alpena County

Hand-picked spot in Alpena County, chosen for unusual mineralogy or documented public access. Each card opens the full coordinates and access notes.

Top pick
Rockport Recreation Area
Public
Alpena County
Rockport State Recreation Area opens a 300-acre former limestone quarry whose floor is scattered with Devonian fossils about 400 million years old, including Petoskey stones, Favosites honeycomb coral, brachiopods, and crinoids.
Petoskey Stones, Fossilized Coral, Brachiopods, Crinoid Stems

Spots in Alpena County

Spot	Minerals	Coordinates	Access
Partridge Point	Crinoid Brachiopod Horn Coral Blastoid	45.0078, -83.4322	Public
Rockport Recreation AreaOld Grade Road	Petoskey Stones Fossilized Coral Brachiopods Crinoid Stems Pyrite Petoskey Stone Brachiopod Horn Coral +7 more	45.2013, -83.3949	Public

Neighboring counties in Michigan

Adjacent rockhounding counties, ranked by how close their centroids sit to Alpena County. A natural extension if Alpena County is already on your trip plan.

Alpena County FAQ

Where can I rockhound in Alpena County, Michigan?+

RockHoundR tracks 2 rockhounding spots in Alpena County. Each entry below has coordinates, mineral notes, and access type. Always confirm local rules before collecting.

What rocks and minerals are common in Alpena County?+

Spots in Alpena County most often produce Brachiopod, Horn Coral, Blastoid, Brachiopods, Bryozoan. Individual spots can vary widely.

Are these Alpena 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 Alpena County rockhounding trip

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