Magnus Park: Petoskey Stone & Charlevoix Stone Rockhounding in Emmet County, Michigan

Updated August 2026

Magnus Park is a mapped rockhounding spot in Emmet County, Michigan. Reported finds include petoskey stone, charlevoix stone, brachiopod, horn coral, slag. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Emmet County
State: Michigan
Coordinates: 45.37266, -84.97519

Geology at Magnus Park

This spot sits on Traverse Group, mapped as limestone 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: Traverse Group
Age: 395–385 Ma (Middle Devonian)
Rock types: limestone
Elevation: 600 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 Magnus Park

Best months: April to October. Typical highs run 75°F in midsummer and 27°F in midwinter, with winter lows near 15°F.

Climate normals: NOAA 1991-2020 monthlies, PETOSKEY station (0 mi away).

Land & collecting status

Generally open to casual rockhounding

Most public-tagged spots sit on BLM, U.S. Forest Service, or other federal land where reasonable hand collecting of common rocks and minerals is allowed. Confirm posted rules and active mining claims before you dig.

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 Magnus 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 Magnus Park.

Magnus Park FAQ

Where is Magnus Park?+

Magnus Park is in Emmet County, Michigan, at 45.37266, -84.97519.

What rocks and minerals can you find at Magnus Park?+

Magnus Park is reported to produce Petoskey Stone, Charlevoix Stone, Brachiopod, Horn Coral, Slag.

Is collecting allowed at Magnus Park?+

Generally open to casual rockhounding. Most public-tagged spots sit on BLM, U.S. Forest Service, or other federal land where reasonable hand collecting of common rocks and minerals is allowed. Confirm posted rules and active mining claims before you dig. Always confirm current rules with the managing agency before a trip.

What tools should I bring to Magnus 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 Magnus Park?+

The most comfortable months at Magnus Park are April to October.

How do I get to Magnus Park?+

Open the directions link to navigate to 45.37266, -84.97519 in Google Maps. Some spots are remote, so check road conditions before driving out.

More rockhounding in Michigan

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Open Magnus Park on the map

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