Appleton: Lake Superior Agate Rockhounding in Swift County, Minnesota

Updated June 2026

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

Quick details

Access: Public area
County: Swift County
State: Minnesota
Nearest road: US 59
Postcode: 56208
Coordinates: 45.21491, -96.00918

Geology at Appleton

This spot sits on Undifferentiated, mapped as conglomerate, sandstone, and mudstone that formed roughly 100 to 72 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: Undifferentiated
Age: 100–72 Ma (Late Cretaceous)
Rock types: conglomerate, sandstone, and mudstone
Elevation: 990 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 Appleton

Best months: April to October. Typical highs run 85°F in midsummer and 24°F in midwinter, with winter lows near 5°F.

Climate normals: NOAA 1991-2020 monthlies, MILAN 1NW station (8 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 Appleton

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 Appleton.

Appleton FAQ

Where is Appleton?+

Appleton is in Swift County, Minnesota, at 45.21491, -96.00918. Nearest road: US 59.

What rocks and minerals can you find at Appleton?+

Appleton is reported to produce Lake Superior Agate.

Is collecting allowed at Appleton?+

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 Appleton?+

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 Appleton?+

The most comfortable months at Appleton are April to October.

How do I get to Appleton?+

Open the directions link to navigate to 45.21491, -96.00918 in Google Maps. The nearest road is US 59.

More rockhounding in Minnesota

See all 49 Minnesota spots →

Open Appleton on the map

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