RockWoofCheck access before you go. Most sites listed here are old mines, quarries or prospects, and many are on private land or active mining claims. Get the landowner's permission, check the rules of the agency that manages any public land, and never enter mine workings. Locations are approximate.
Best regions by county
Ranked by the number of USGS-recorded sites, not by access or quality.
- Billings County: 16 sites
Top minerals
Minerals most often recorded
Counties
| County | Sites |
|---|---|
| Billings County | 16 |
| Rolette County (fewer than 5 sites, no page) | 4 |
| Stark County (fewer than 5 sites, no page) | 3 |
| Slope County (fewer than 5 sites, no page) | 3 |
| Divide County (fewer than 5 sites, no page) | 2 |
| McKenzie County (fewer than 5 sites, no page) | 1 |
| Golden Valley County (fewer than 5 sites, no page) | 1 |
How we built this page: we counted named sites in the USGS Mineral Resources Data System (MRDS) for this area, left out sand, gravel, crushed stone, clay pits and unnamed sites, grouped them by Census county, and linked every site to its USGS record. We did not visit these sites, and MRDS does not tell you who owns the land or whether collecting is allowed.
Source: USGS Mineral Resources Data System (MRDS). USGS ceased systematic updates to MRDS around 2011, so status and details may be out of date. Each site links to its USGS record.
Updated