| Steffens Prospect | 6.4 mi | Mica | — | Occurrence |
| Portable Screening Plant | 7.8 mi | Construction Sand and Gravel | Surface | Abandoned |
| Mountain States Clay Products, Inc. | 14.4 mi | Clay | — | Occurrence |
| Unnamed Location | 15.4 mi | Aluminum | — | Occurrence |
| Vananda Deposit | 16.2 mi | Bentonite | — | Producer |
| Hallett Minerals Pit | 16.6 mi | Bentonite | Surface | Producer |
| Hallett Minerals Pit | 17.1 mi | Clay | Surface | Producer |
| Rosebud County | 17.6 mi | Construction Sand and Gravel | Surface | Intermittent |
| Unnamed Location | 17.7 mi | Aluminum | — | Occurrence |
| Bentonite Mine and Plant | 19.1 mi | Clay | — | Producer |
| Jones Quarry | 21.7 mi | Sand, Common | Surface | Active |
| Erickson Ranch | 23.5 mi | Clay | — | Occurrence |
| Colstrip Area Iron | 25.0 mi | Iron | — | Unknown |