Rockhounding in Olmsted County, Minnesota

3 mapped rockhounding spots in Olmsted County. Most commonly produces fossils, lake superior agate, chalcedony, gold.

Olmsted County rockhounding photos

Representative spot and material photos from this county, shown where verified public image records are available.

1 photo

Silver Lake and its dam on the South Fork Zumbro River at Rochester, Olmsted County, Minnesota — RochesterOlmsted County, Minnesota

Minerals reported in Olmsted County

Standout in Olmsted County

Hand-picked spot in Olmsted County, chosen for unusual mineralogy or documented public access. Each card opens the full coordinates and access notes.

Top pick
Rochester
Public
Olmsted County
The Rochester area combines two southeastern Minnesota draws: Lake Superior agate scattered through the glacial and river gravels, and Ordovician marine fossils weathering out of the region's roughly 450-million-year-old limestone and shale. Trilobites, cephalopods, brachiopods, and crinoids record the shallow tropical sea that once covered the state. Creek cuts, road exposures, and gravel deposits are the usual hunting ground.
Lake Superior Agate, Chalcedony, Fossils

Spots in Olmsted County

Spot	Minerals	Coordinates	Access
Olmsted County19th Street Southeast	Gold	43.9980, -92.3889	Public
RochesterZumbro River Trail South	Lake Superior Agate Chalcedony Fossils	43.9970, -92.4930	Public
Rochester (area 2)Highway 14 East	Lake Superior Agate Fossils	44.0001, -92.2829	Public

Neighboring counties in Minnesota

Adjacent rockhounding counties, ranked by how close their centroids sit to Olmsted County. A natural extension if Olmsted County is already on your trip plan.

Across the state line from Olmsted County

Rockhounding counties in neighboring states within driving range. Geology rarely respects state borders — these are often the closest mapped spots you can reach without going deeper into Minnesota.

Olmsted County FAQ

Where can I rockhound in Olmsted County, Minnesota?+

RockHoundR tracks 3 rockhounding spots in Olmsted County. Each entry below has coordinates, mineral notes, and access type. Always confirm local rules before collecting.

What rocks and minerals are common in Olmsted County?+

Spots in Olmsted County most often produce Fossils, Lake Superior Agate, Chalcedony, Gold. Individual spots can vary widely.

Are these Olmsted County rockhounding spots on public land?+

Most spots in this list are tagged public, but access can change with seasons, claims, and local closures. Always verify before driving out — links in the app open the right BLM, USFS, or county pages.

Plan a Olmsted County rockhounding trip

Open RockHoundR to see these spots on the map alongside land overlays, weather, geology, and your saved finds.