Union — Rockhounding in Hardin County, Iowa

Union is a mapped rockhounding spot in Hardin County, Iowa. Reported finds include geode. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Hardin County
State: Iowa
Nearest road: 305th Street
Postcode: 50258
Coordinates: 42.25402, -93.05812

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 Union

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

Geode Encyclopedia →

Nearby rockhounding spots

Other rockhounding spots within driving distance of Union.

Union FAQ

Where is Union?+

Union is in Hardin County, Iowa, at 42.25402, -93.05812. Nearest road: 305th Street.

What rocks and minerals can you find at Union?+

Union is reported to produce Geode.

Is collecting allowed at Union?+

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.

How do I get to Union?+

Open the directions link to navigate to 42.25402, -93.05812 in Google Maps. The nearest road is 305th Street.

More rockhounding in Iowa

See all 49 Iowa spots →

Open Union on the map

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