General Area (Winona): Lake Superior Agate Rockhounding in Winona County, Minnesota

Updated June 2026

General Area (Winona) is a mapped rockhounding spot in Winona County, Minnesota. Reported finds include lake superior agate. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Winona County
State: Minnesota
Nearest road: US 61
Postcode: 55959
Coordinates: 44.05879, -91.70052

Geology at General Area (Winona)

This spot sits on Eau Claire Formation, mapped as sandstone and siltstone fine grained that formed roughly 510 to 485 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: Eau Claire Formation
Age: 510–485 Ma (Middle Cambrian to Late Cambrian)
Rock types: sandstone and siltstone fine grained
Elevation: 660 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 General Area (Winona)

Best months: April to October. Typical highs run 83°F in midsummer and 25°F in midwinter, with winter lows near 8°F.

Climate normals: NOAA 1991-2020 monthlies, WINONA DAM 5 A station (2 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.

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

Found at General Area (Winona)

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

Lake Superior Agate Encyclopedia →

Nearby rockhounding spots

Other rockhounding spots within driving distance of General Area (Winona).

Across the state line from General Area (Winona)

General Area (Winona) is close enough to the Minnesota border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.

General Area (Winona) FAQ

Where is General Area (Winona)?+

General Area (Winona) is in Winona County, Minnesota, at 44.05879, -91.70052. Nearest road: US 61.

What rocks and minerals can you find at General Area (Winona)?+

General Area (Winona) is reported to produce Lake Superior Agate.

Is collecting allowed at General Area (Winona)?+

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 General Area (Winona)?+

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 General Area (Winona)?+

The most comfortable months at General Area (Winona) are April to October.

How do I get to General Area (Winona)?+

Open the directions link to navigate to 44.05879, -91.70052 in Google Maps. The nearest road is US 61.

More rockhounding in Minnesota

See all 49 Minnesota spots →

Open General Area (Winona) on the map

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