Lakeside Park: Petoskey Stone & Unakite Rockhounding in Saint Clair County, Michigan

Updated August 2026

Lakeside Park is a mapped rockhounding spot in Saint Clair County, Michigan. Reported finds include petoskey stone, unakite, puddingstone, cold water agate. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Saint Clair County
State: Michigan
Coordinates: 43.01975, -82.43025

Geology at Lakeside Park

This spot sits on Antrim Shale, mapped as black shale that formed roughly 385 to 360 million years ago. Tough silica like agate, jasper, and chert typically weathers out of beds like these and collects as float in drainages and on deflation surfaces.

Mapped unit: Antrim Shale
Age: 385–360 Ma (Late Devonian)
Rock types: black shale
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 Lakeside Park

Best months: April to November. Typical highs run 81°F in midsummer and 31°F in midwinter, with winter lows near 20°F.

Climate normals: NOAA 1991-2020 monthlies, PORT HURON station (3 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 Lakeside 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 Lakeside Park.

Lakeside Park FAQ

Where is Lakeside Park?+

Lakeside Park is in Saint Clair County, Michigan, at 43.01975, -82.43025.

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

Lakeside Park is reported to produce Petoskey Stone, Unakite, Puddingstone, Cold Water Agate.

Is collecting allowed at Lakeside 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 Lakeside Park?+

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 Lakeside Park?+

The most comfortable months at Lakeside Park are April to November.

How do I get to Lakeside Park?+

Open the directions link to navigate to 43.01975, -82.43025 in Google Maps. Some spots are remote, so check road conditions before driving out.

More rockhounding in Michigan

See all 107 Michigan spots →

Open Lakeside Park on the map

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