| Mark | School | Meet |
|---|
| 41.91 | Helena (AA) | Helena Crosstown Meet |
| 42.03 | Billings West (AA) | Midland Roundtable Top 10 |
| 42.19 | Flathead (AA) | Archie Roe Invitational |
| 42.60 | Helena Capital (AA) | MCPS Invitational |
| 42.62 | Missoula Hellgate (AA) | Missoula "Greg Rice" City Meet |
| 42.72 | Gallatin (Bozeman) (AA) | Midland Roundtable Top 10 |
| 42.76 | Missoula Sentinel (AA) | Western AA Divisional |
| 43.01 | Glacier (AA) | Archie Roe Invitational |
| 43.14 | Missoula Big Sky (AA) | Western AA Divisional |
| 43.28 | Billings Skyview (AA) | Billings City Meet |
| 43.46 | Butte (AA) | Western AA Divisional |
| 43.52 | Great Falls (AA) | Great Falls Crosstown Meet |
| 43.76 | Bozeman (AA) | Midland Roundtable Top 10 |
| 43.89 | Belgrade (AA) | Eastern AA Divisional |
| 44.23 | Billings Senior (AA) | Billings Invite |
| 44.86 | Great Falls CMR (AA) | Capital/CMR Dual |