Hoeft State Park: Puddingstone & Granite Rockhounding in Presque Isle County, Michigan

Updated August 2026

Hoeft State Park is a mapped rockhounding spot in Presque Isle County, Michigan. Reported finds include puddingstone, granite, quartz, chert, horn coral, and more. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Paid / fee dig
County: Presque Isle County
State: Michigan
Coordinates: 45.46372, -83.88356

Geology at Hoeft State Park

This spot sits on Detroit River Group, mapped as dolostone that formed roughly 395 to 385 million years ago. Limestone like this typically forms in ancient seas, so marine fossils such as brachiopods, corals, and crinoids tend to weather out of fresh exposures.

Mapped unit: Detroit River Group
Age: 395–385 Ma (Middle Devonian)
Rock types: dolostone
Elevation: 630 ft

Geologic mapping via Macrostrat and the underlying state geological survey maps (CC BY 4.0). Bedrock at the surface can vary within a mapped unit.

Best time to visit Hoeft State Park

Best months: April to October. Typical highs run 80°F in midsummer and 28°F in midwinter, with winter lows near 14°F.

Climate normals: NOAA 1991-2020 monthlies, ROGERS CITY station (5 mi away).

Land & collecting status

Pay-to-dig site

This is a fee-dig location. Hours, prices, and what you can keep vary by operator. Call ahead before driving out.

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 Hoeft State Park

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 Hoeft State Park.

Hoeft State Park FAQ

Where is Hoeft State Park?+

Hoeft State Park is in Presque Isle County, Michigan, at 45.46372, -83.88356.

What rocks and minerals can you find at Hoeft State Park?+

Hoeft State Park is reported to produce Puddingstone, Granite, Quartz, Chert, Horn Coral, Brachiopod, Crinoid.

Is collecting allowed at Hoeft State Park?+

Pay-to-dig site. This is a fee-dig location. Hours, prices, and what you can keep vary by operator. Call ahead before driving out. Always confirm current rules with the managing agency before a trip.

What tools should I bring to Hoeft State Park?+

A rock hammer, a cold chisel, safety glasses, and newspaper or foam for wrapping finds cover most fossil ground. A trowel and a sieve help in soft exposures.

When is the best time to visit Hoeft State Park?+

The most comfortable months at Hoeft State Park are April to October.

How do I get to Hoeft State Park?+

Open the directions link to navigate to 45.46372, -83.88356 in Google Maps. Some spots are remote, so check road conditions before driving out.

More rockhounding in Michigan

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Open Hoeft State Park on the map

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