| Mark | School | Meet |
|---|
| 42.42 | Laurel (A) | State A |
| 42.63 | Beaverhead Co./Dillon (A) | State A |
| 43.50 | Frenchtown (A) | State A |
| 43.51 | Hamilton (A) | State A |
| 43.59 | Columbia Falls (A) | State A |
| 44.13 | Corvallis (A) | State A |
| 44.30 | Park/Livingston (A) | State A |
| 44.33 | Sidney (A) | State A |
| 44.58 | Billings Central (A) | Billings Central Invite |
| 44.68 | Butte Central (A) | Midland Roundtable Top 10 |
| 44.97 | Custer Co./Miles City (A) | State A |
| 45.21 | East Helena (A) | State A |
| 45.24 | Whitefish (A) | Columbia Falls-Whitefish Dual |
| 45.37 | Havre (A) | State A |
| 45.42 | Stevensville (A) | Western A Divisional |
| 45.42 | Dawson Co./Glendive (A) | State A |
| 45.50 | Polson (A) | State A |