| Business | Phone |
| Fish Wildlife & Parks 2300 Lake Elmo Dr, Billings 59105 | (406) 247-2940 |
| Natural Resources Dept 1371 Rimtop Dr, Billings 59105 | (406) 247-4400 |
| Natural Resources Dept 2535 Saint Johns Ave, Billings 59102 | (406) 656-0040 |
| Mines & Geology Bureau 1300 N 27th St, Billings 59101 | (406) 657-2938 |