Where to Find Trilobites in the United States
2 mapped trilobites spots across 2 U.S. states. Trilobites is reported at multiple rockhounding spots across the United States. The map below shows where collectors most often find it on legal public ground.
Learn about trilobites: properties & identification →Map showing where to find trilobites across the United States, with 2 mapped spots
Top states for trilobites
States ranked by number of trilobites spots in our database. States in bold link to a focused trilobites-in-state list.
Every trilobites spot we track
Sorted by state and county. Coordinates open in Google Maps.
| Spot | County | Minerals | Coordinates | Access |
|---|---|---|---|---|
| WeisburgWeisburg Road | Dearborn County |
| 39.2222, -85.0484 | Public |
| General Area QuarriesMamerow Lane | Racine County |
| 42.7755, -88.2515 | Public |
Trilobites rockhounding FAQ
Where is the best place to find trilobites in the U.S.?+
Indiana, Wisconsin have the highest concentrations of trilobites in this list. Each state's quality and access varies — open the linked state pages for a detailed view.
How many trilobites rockhounding spots does RockHoundR track?+
2 mapped spots across 2 states. The app keeps these on a map alongside your private finds.
Can I legally collect trilobites on public land?+
Casual hand collecting of common rocks and minerals like trilobites is allowed on most BLM and U.S. Forest Service land, with daily and annual limits set by the local field office. National parks, most state parks, and tribal land are off-limits. Always check with the managing agency before a trip.
How do I identify trilobites in the field?+
Field identification of trilobites comes down to color, hardness, fracture, and luster. The RockHoundR app links to geology details for each spot to help narrow down what you might be picking up.
Hunt trilobites on the map
Open RockHoundR to see these spots on a real map with public land overlays and trip-planning details.
