Saint Clair: Anglesite & Galena Rockhounding in Franklin County, Missouri

Updated June 2026

Saint Clair is a mapped rockhounding spot in Franklin County, Missouri. Reported finds include anglesite, galena, barite, calcite, cerussite, and more. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Franklin County
State: Missouri
Nearest road: Rockyhill Trail
Coordinates: 38.30199, -90.91912

Geology at Saint Clair

This spot sits on Gasconade Dolomite, mapped as dolostone that formed roughly 485 to 470 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: Gasconade Dolomite
Age: 485–470 Ma (Early Ordovician)
Rock types: dolostone
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 Saint Clair

Best months: February to December. Typical highs run 90°F in midsummer and 43°F in midwinter, with winter lows near 22°F.

Climate normals: NOAA 1991-2020 monthlies, UNION station (11 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 Saint Clair

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 Saint Clair.

Across the state line from Saint Clair

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

SpartaTop pick in IllinoisRandolph County, Illinois · 66 mi awayPyrite, Fossils

Saint Clair FAQ

Where is Saint Clair?+

Saint Clair is in Franklin County, Missouri, at 38.30199, -90.91912. Nearest road: Rockyhill Trail.

What rocks and minerals can you find at Saint Clair?+

Saint Clair is reported to produce Anglesite, Galena, Barite, Calcite, Cerussite, Pyrite, Smithsonite, Sphalerite.

Is collecting allowed at Saint Clair?+

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 Saint Clair?+

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 Saint Clair?+

The most comfortable months at Saint Clair are February to December.

How do I get to Saint Clair?+

Open the directions link to navigate to 38.30199, -90.91912 in Google Maps. The nearest road is Rockyhill Trail.

More rockhounding in Missouri

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Open Saint Clair on the map

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