Where to hunt

Northeast Lower Peninsula and Lake Huron

Lake Huron shoreline and old limestone quarries.

Spots (11)

Open a card for its rocks, land and rules.

State parks and state land (DNR) (10)

25 lb per year on state land

Rockport State Recreation Area

Alpena and Presque Isle counties

State land (DNR)

Rocks, land and rules

The DNR lists searching for fossils among the things to do here. The park also includes a protected natural area, so check posted limits before you collect.1

Rules: State park land (DNR). The state limit applies: no more than 25 pounds of rocks, mineral specimens and invertebrate fossils per person per year.2

P.H. Hoeft State Park

Presque Isle County, Rogers City

State land (DNR)

Rocks, land and rules

Rocks on the Michigan Geological Survey rockhounding map: puddingstone, quartz, granite, chert, horn coral, crinoid and brachiopod.3

Rules: State park land (DNR). The state limit applies: no more than 25 pounds of rocks, mineral specimens and invertebrate fossils per person per year.2

Thompson's Harbor State Park

Presque Isle County, Rogers City

State land (DNR)

Rocks, land and rules

The DNR describes "5 miles of rocky shoreline".4 Rocks on the Michigan Geological Survey rockhounding map: granite, quartz, gneiss and stromatolite.3

Rules: State park land (DNR). The state limit applies: no more than 25 pounds of rocks, mineral specimens and invertebrate fossils per person per year.2

Negwegon State Park

Alcona and Alpena counties

State land (DNR)

Rocks, land and rules

Rocks on the Michigan Geological Survey rockhounding map: puddingstone, granite, quartz, Charlevoix stone, Petoskey stone, gneiss and Gowganda tillite.3

Rules: State park land (DNR). The state limit applies: no more than 25 pounds of rocks, mineral specimens and invertebrate fossils per person per year.2

Harrisville State Park

Alcona County, Harrisville

State land (DNR)

Rocks, land and rules

Rocks on the Michigan Geological Survey rockhounding map: granite, quartz, horn coral, chert, chain coral, Petoskey stone, puddingstone and Yooperlite.3

Rules: State park land (DNR). The state limit applies: no more than 25 pounds of rocks, mineral specimens and invertebrate fossils per person per year.2

Tawas Point State Park

Iosco County, East Tawas

State land (DNR)

Rocks, land and rules

Rocks on the Michigan Geological Survey rockhounding map: quartz, gneiss, granite, puddingstone, Petoskey stone, brachiopod and jasper.3

Rules: State park land (DNR). The state limit applies: no more than 25 pounds of rocks, mineral specimens and invertebrate fossils per person per year.2

Cheboygan State Park

Cheboygan County, Cheboygan

State land (DNR)

Rocks, land and rules

The Michigan Geological Survey rockhounding map lists this spot, but marks its rocks as unconfirmed.3

Rules: State park land (DNR). The state limit applies: no more than 25 pounds of rocks, mineral specimens and invertebrate fossils per person per year.2

Onaway State Park

Presque Isle County, Onaway (inland, on Black Lake)

State land (DNR)

Rocks, land and rules

An inland park. The DNR describes a "cobblestone shoreline, large unique rock outcroppings".5 The Michigan Geological Survey rockhounding map lists fossils.3

Rules: State park land (DNR). The state limit applies: no more than 25 pounds of rocks, mineral specimens and invertebrate fossils per person per year.2

Sturgeon Point State Park

Alcona County, about 5 miles north of Harrisville

State land (DNR)

Rocks, land and rules

Rocks on the Michigan Geological Survey rockhounding map: Petoskey stone, granite, fossils, quartz, chert, limestone and puddingstone.3 The DNR describes the shore as mostly sandy: "half a mile of sandy Lake Huron shoreline".6

Rules: State park land (DNR). The state limit applies: no more than 25 pounds of rocks, mineral specimens and invertebrate fossils per person per year.2

Partridge Point public access site

Alpena County, Alpena Township

State land (DNR)

Rocks, land and rules

A City of Alpena recreation plan says the Public Access Site at Partridge Point is "Owned by the MDNR, this site provides access to the waters of Thunder Bay in Lake Huron."7 Rocks on the Michigan Geological Survey rockhounding map: crinoid stem, brachiopod, crinoid, horn coral and blastoid.3

Rules: DNR land (public access site). The state limit applies: no more than 25 pounds of rocks, mineral specimens and invertebrate fossils per person per year.2

Local parks (1)

Mich-e-ke-wis Park

Alpena County, Alpena

Local park: City of Alpena

Rocks, land and rules

The City of Alpena says the park is "located on Lake Huron along State Avenue".8 No rock list from an official source yet.

Rules: No rock collecting rule posted by the park; check with the park manager. Managed by the City of Alpena.8 On the Great Lakes shore below the ordinary high water mark: the same 25 lb limit as on state land, which comes from the DNR rule R 299.922(hh), not from Part 325.2 EGLE describes it as covering state-owned and public trust lands.9

Good to know

  • Corals are among the most common fossils on Michigan beaches.10
  • Presque Isle and Alpena counties are among the counties where the Gravel Point Formation, the source of Petoskey stones, occurs.11

Sources (11)

  1. Michigan DNR, Rockport State Recreation Area. https://www.michigan.gov/recsearch/parks/rockport (checked October 21, 2026)
  2. Michigan Administrative Code, R 299.921 to R 299.933, State Land Use Rules (Department of Natural Resources). https://ars.apps.lara.state.mi.us/AdminCode/DownloadAdminCodeFile?FileName=R+299.921+to+R+299.933.pdf (checked October 21, 2026)
  3. Michigan Geological Survey (Western Michigan University), Michigan Rockhounding Map, linked from MGS Rockhounds. https://mgs.wmich.edu/education-and-outreach/corekids/mgs-rockhounds/ (checked October 21, 2026)
  4. Michigan DNR, Thompson's Harbor State Park. https://www.michigan.gov/recsearch/parks/thompsonsharbor (checked October 22, 2026)
  5. Michigan DNR, Onaway State Park. https://www.michigan.gov/recsearch/parks/onaway (checked October 22, 2026)
  6. Michigan DNR, Sturgeon Point State Park. https://www.michigan.gov/recsearch/parks/sturgeonpoint (checked October 22, 2026)
  7. City of Alpena, 2023 Recreation Plan, Recreation Inventory (draft, PDF). https://cms3.revize.com/revize/alpenami/departments/planning/Planning_Commission/Rec_Plan_2023_11_06_DRAFT_City_of_Alpena_Recreation_Inventory.pdf (checked October 22, 2026)
  8. City of Alpena, Mich-e-ke-wis Park. https://www.alpena.mi.us/residents/city_parks/mich-e-ke-wis_park.php (checked October 22, 2026)
  9. Michigan EGLE, Rockhounding. https://www.michigan.gov/egle/public/learn/geology/rockhounding (checked October 21, 2026)
  10. Michigan EGLE, Fossils. https://www.michigan.gov/egle/public/learn/geology/rockhounding/fossils (checked October 21, 2026)
  11. A. E. Seaman Mineral Museum (Michigan Tech), Mineralogy of Michigan: Calcite (PDF). https://museum.mtu.edu/pdfs/CALCITE.pdf (checked October 21, 2026)

What did I find?

Narrow down all 47 rocks, minerals and fossils by type, color and where you found it. It is a starting point, not a final ID.

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See all 47 on the Rocks and fossils page