Port Crescent State Park: Rockhounding in Huron County, Michigan

Updated August 2026

Port Crescent State Park is a mapped rockhounding spot in Huron County, Michigan. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Paid / fee dig
County: Huron County
State: Michigan
Postcode: 48467
Coordinates: 44.00160, -83.06952

Geology at Port Crescent State Park

This spot sits on Marshall Sandstone, mapped as sandstone that formed roughly 360 to 325 million years ago. Sedimentary rock like this erodes unevenly, so the most productive collecting is typically along fresh cuts, badland slopes, and active drainages.

Mapped unit: Marshall Sandstone
Age: 360–325 Ma (Mississippian)
Rock types: sandstone
Elevation: 580 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 Port Crescent State Park

Best months: April to November. Typical highs run 78°F in midsummer and 29°F in midwinter, with winter lows near 17°F.

Climate normals: NOAA 1991-2020 monthlies, PORT AUSTIN WWTP station (6 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

Nearby rockhounding spots

Other rockhounding spots within driving distance of Port Crescent State Park.

Port Crescent State Park FAQ

Where is Port Crescent State Park?+

Port Crescent State Park is in Huron County, Michigan, at 44.00160, -83.06952.

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

Port Crescent State Park is on the rockhounding map but no minerals are listed in our reference. Open RockHoundR to see what other rockhounds have logged.

Is collecting allowed at Port Crescent 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 Port Crescent State Park?+

A rock hammer, sturdy gloves, safety glasses, and a collecting bag cover the basics here. Add a spray bottle: wet rock shows color and pattern that dry rock hides.

When is the best time to visit Port Crescent State Park?+

The most comfortable months at Port Crescent State Park are April to November.

How do I get to Port Crescent State Park?+

Open the directions link to navigate to 44.00160, -83.06952 in Google Maps. Some spots are remote, so check road conditions before driving out.

More rockhounding in Michigan

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Open Port Crescent State Park on the map

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