McLouth: Lake Superior Agate & Chalcedony Rockhounding in Jefferson County, Kansas

Updated June 2026

McLouth is a mapped rockhounding spot in Jefferson County, Kansas. Reported finds include lake superior agate, chalcedony, jasper, petrified wood. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Jefferson County
State: Kansas
Nearest road: West Lake Street
Postcode: 66054
Coordinates: 39.19420, -95.20837

Geology at McLouth

This spot sits on Drift, mapped as sand and silt that formed within roughly the last 3 million years. Petrified wood typically travels as tough float, and worked gravels like these are exactly where weathered pieces tend to collect.

Mapped unit: Drift
Age: 3 Ma to present (Pleistocene)
Rock types: sand and silt
Elevation: 1,200 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 McLouth

Best months: March to November. Typical highs run 90°F in midsummer and 38°F in midwinter, with winter lows near 18°F.

Climate normals: NOAA 1991-2020 monthlies, OSKALOOSA 4 NE station (5 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 McLouth

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 McLouth.

Across the state line from McLouth

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

McLouth FAQ

Where is McLouth?+

McLouth is in Jefferson County, Kansas, at 39.19420, -95.20837. Nearest road: West Lake Street.

What rocks and minerals can you find at McLouth?+

McLouth is reported to produce Lake Superior Agate, Chalcedony, Jasper, Petrified Wood.

Is collecting allowed at McLouth?+

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 McLouth?+

A rock hammer, sturdy gloves, and a padded bag cover petrified wood hunting. Most pieces are surface float, so walking slopes and washes beats digging.

When is the best time to visit McLouth?+

The most comfortable months at McLouth are March to November.

How do I get to McLouth?+

Open the directions link to navigate to 39.19420, -95.20837 in Google Maps. The nearest road is West Lake Street.

More rockhounding in Kansas

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Open McLouth on the map

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