Mississippi River: Pearls Rockhounding in Crawford County, Wisconsin

Updated July 2026

Mississippi River is a mapped rockhounding spot in Crawford County, Wisconsin. Reported finds include pearls. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Check locally
County: Crawford County
State: Wisconsin
Postcode: 60832
Coordinates: 43.01811, -91.15046

Geology at Mississippi River

This spot sits on Prairie du Chien Group, mapped as dolostone that formed roughly 485 to 470 million years ago. Carbonate rock like this dissolves and weathers readily, so fresh road cuts, quarries, and creek exposures are typically the most productive ground.

Mapped unit: Prairie du Chien Group
Age: 485–470 Ma (Early Ordovician)
Rock types: dolostone
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 Mississippi River

Best months: March to November. Typical highs run 83°F in midsummer and 27°F in midwinter, with winter lows near 10°F.

Climate normals: NOAA 1991-2020 monthlies, PRAIRIE DU CHIEN station (2 mi away).

Land & collecting status

Confirm rules before collecting

Land status here is not confirmed. Verify with the managing agency before collecting — federal, state, and tribal rules differ.

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.

Sources: RockHoundR public spot dataset, app land overlays, and local agency review before each trip.

Found at Mississippi River

Each chip opens all spots that produce that material; the encyclopedia link opens the full ID and field guide.

Pearls

Nearby rockhounding spots

Other rockhounding spots within driving distance of Mississippi River.

Across the state line from Mississippi River

Mississippi River is close enough to the Wisconsin border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.

Mississippi River FAQ

Where is Mississippi River?+

Mississippi River is in Crawford County, Wisconsin, at 43.01811, -91.15046.

What rocks and minerals can you find at Mississippi River?+

Mississippi River is reported to produce Pearls.

Is collecting allowed at Mississippi River?+

Confirm rules before collecting. Land status here is not confirmed. Verify with the managing agency before collecting — federal, state, and tribal rules differ. Always confirm current rules with the managing agency before a trip.

What tools should I bring to Mississippi River?+

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 Mississippi River?+

The most comfortable months at Mississippi River are March to November.

How do I get to Mississippi River?+

Open the directions link to navigate to 43.01811, -91.15046 in Google Maps. Some spots are remote, so check road conditions before driving out.

More rockhounding in Wisconsin

See all 77 Wisconsin spots →

Open Mississippi River on the map

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