Tri-State Marker — Rockhounding in Cimarron County, Oklahoma
Tri-State Marker is a mapped rockhounding spot in Cimarron County, Oklahoma. Reported finds include rose agate. Below: coordinates, access notes, nearby spots, and trip-planning links.
Map showing Tri-State Marker in Cimarron County, Oklahoma
Quick details
- Access
- Check locally
- County
- Cimarron County
- State
- Oklahoma
- Nearest road
- E0007 Road
- Coordinates
- 36.99913, -103.00057
Land & collecting status
Confirm rules before collecting
Land status here is not confirmed. Verify with the managing agency before collecting — federal, state, and tribal rules differ.
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 Tri-State Marker
Each chip opens all spots that produce that material; the encyclopedia link opens the full ID and field guide.
- Rose AgateEncyclopedia →
Nearby rockhounding spots
Other rockhounding spots within driving distance of Tri-State Marker.
Across the state line from Tri-State Marker
Tri-State Marker is close enough to the Oklahoma border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.
Tri-State Marker FAQ
Where is Tri-State Marker?+
What rocks and minerals can you find at Tri-State Marker?+
Is collecting allowed at Tri-State Marker?+
How do I get to Tri-State Marker?+
More rockhounding in Oklahoma
See all 34 Oklahoma spots →Open Tri-State Marker on the map
Use the RockHoundR app for live land overlays, weather, geology, directions, and saved finds.
