Hidden Beach: Leland Blue & Petoskey Stone Rockhounding in Leelanau County, Michigan

Updated August 2026

Hidden Beach is a mapped rockhounding spot in Leelanau County, Michigan. Reported finds include leland blue, petoskey stone, unakite, quartz, granite, and more. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Leelanau County
State: Michigan
Postcode: 49654
Coordinates: 45.01964, -85.76448

Geology at Hidden Beach

This spot sits on Traverse Group, mapped as limestone that formed roughly 395 to 385 million years ago. Chert and agate nodules typically form inside carbonate rock like this and weather out as tough, waxy lumps in soils and creek beds.

Mapped unit: Traverse Group
Age: 395–385 Ma (Middle Devonian)
Rock types: limestone
Elevation: 610 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 Hidden Beach

Best months: April to November. Typical highs run 76°F in midsummer and 29°F in midwinter, with winter lows near 19°F.

Climate normals: NOAA 1991-2020 monthlies, NORTHPORT 2W station (10 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 Hidden Beach

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 Hidden Beach.

Hidden Beach FAQ

Where is Hidden Beach?+

Hidden Beach is in Leelanau County, Michigan, at 45.01964, -85.76448.

What rocks and minerals can you find at Hidden Beach?+

Hidden Beach is reported to produce Leland Blue, Petoskey Stone, Unakite, Quartz, Granite, Jasper, Chert, Charlevoix Stone, Banded Chert, Horn Coral, Chain Coral, Mary Ellen Jasper, Yooperlite, Lake Superior Agate, Cold Water Agate.

Is collecting allowed at Hidden Beach?+

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 Hidden Beach?+

Most agate and jasper is surface float: bring a spray bottle, a pick or small shovel, and a sturdy bag. Wet stones show their banding and translucence.

When is the best time to visit Hidden Beach?+

The most comfortable months at Hidden Beach are April to November.

How do I get to Hidden Beach?+

Open the directions link to navigate to 45.01964, -85.76448 in Google Maps. Some spots are remote, so check road conditions before driving out.

More rockhounding in Michigan

See all 107 Michigan spots →

Open Hidden Beach on the map

Use the RockHoundR app for live land overlays, weather, geology, directions, and saved finds.