Where to Find Trilobite Fossils in the United States
1 mapped trilobite fossils spots across 1 U.S. states. Trilobite Fossils is reported at multiple rockhounding spots across the United States. The map below shows where collectors most often find it on legal public ground.
Map showing where to find trilobite fossils across the United States, with 1 mapped spots
Top states for trilobite fossils
States ranked by number of trilobite fossils spots in our database. States in bold link to a focused trilobite fossils-in-state list.
Every trilobite fossils spot we track
Sorted by state and county. Coordinates open in Google Maps.
| Spot | County | Minerals | Coordinates | Access |
|---|---|---|---|---|
| Horseshoe Hills | Gallatin County |
| 46.0223, -111.2712 | Public |
Trilobite Fossils rockhounding FAQ
Where is the best place to find trilobite fossils in the U.S.?+
Montana have the highest concentrations of trilobite fossils in this list. Each state's quality and access varies — open the linked state pages for a detailed view.
How many trilobite fossils rockhounding spots does RockHoundR track?+
1 mapped spots across 1 states. The app keeps these on a map alongside your private finds.
Can I legally collect trilobite fossils on public land?+
Casual hand collecting of common rocks and minerals like trilobite fossils 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 trilobite fossils in the field?+
Field identification of trilobite fossils 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 trilobite fossils on the map
Open RockHoundR to see these spots on a real map with public land overlays and trip-planning details.
