Hazel Green: Barite & Calcite Rockhounding in Grant County, Wisconsin

Updated June 2026

Hazel Green is a mapped rockhounding spot in Grant County, Wisconsin. Reported finds include barite, calcite, galena, marcasite, pyrite, and more. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Grant County
State: Wisconsin
Nearest road: State Highway 80
Postcode: 53811
Coordinates: 42.53271, -90.43590

Geology at Hazel Green

This spot sits on Maquoketa Formation, mapped as shale and dolostone that formed roughly 485 to 445 million years ago. Carbonate rock like this is the classic host for lead, zinc, and fluorite mineralization, which typically follows old cavities and replacement zones.

Mapped unit: Maquoketa Formation
Age: 485–445 Ma (Ordovician)
Rock types: shale and dolostone
Elevation: 970 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 Hazel Green

Best months: April to October. Typical highs run 81°F in midsummer and 26°F in midwinter, with winter lows near 9°F.

Climate normals: NOAA 1991-2020 monthlies, GALENA station (9 mi away), adjusted for elevation.

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.

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

Found at Hazel Green

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 Hazel Green.

Across the state line from Hazel Green

Hazel Green 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.

Hazel Green FAQ

Where is Hazel Green?+

Hazel Green is in Grant County, Wisconsin, at 42.53271, -90.43590. Nearest road: State Highway 80.

What rocks and minerals can you find at Hazel Green?+

Hazel Green is reported to produce Barite, Calcite, Galena, Marcasite, Pyrite, Smithsonite, Sphalerite.

Is collecting allowed at Hazel Green?+

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 Hazel Green?+

A rock hammer, gloves, and safety glasses cover old mining-district ground. Stay out of shafts and adits; the best specimens typically come from dump piles.

When is the best time to visit Hazel Green?+

The most comfortable months at Hazel Green are April to October.

How do I get to Hazel Green?+

Open the directions link to navigate to 42.53271, -90.43590 in Google Maps. The nearest road is State Highway 80.

More rockhounding in Wisconsin

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Open Hazel Green on the map

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