| Mark | Athlete | School | Year | Meet |
|---|
| 43.17 | Morgan Evans | Great Falls (AA) | 12 | State AA |
| 44.60 | Tavy Findon | Billings Senior (AA) | 10 | State AA |
| 44.75 | Ashley McElmurry | Missoula Sentinel (AA) | 10 | State AA |
| 44.92 | Syd Steele | Missoula Sentinel (AA) | 12 | State AA |
| 44.96 | Abigail Harmon | Helena Capital (AA) | 11 | State AA |
| 45.04 | Ahna Kreitinger | Glacier (AA) | 12 | State AA |
| 46.67 | Fallon Parker | Belgrade (AA) | 10 | State A |
| 46.84 | Pipi Eitel | Belgrade (AA) | 12 | Eastern A Divisional |
| 46.93 | Mayjia Horst | Bozeman (AA) | 9 | Midland Roundtable Top Ten |
| 47.51 | Elsa Sveen | Bozeman (AA) | 12 | Eastern AA Divisional |
| 47.82 | Kailee Stoppel | Billings West (AA) | 11 | State AA |
| 47.89 | Aubry Grame | Glacier (AA) | 9 | Western AA Divisional |
| 48.19 | Maggie Kleinhans | Bozeman (AA) | 9 | Midland Roundtable Top Ten |
| 48.22 | Kelsey Gillespie | Flathead (AA) | 12 | Great Falls Optimist Club Invite |
| 48.53 | Jordan Gilcrist | Billings Senior (AA) | 11 | State AA |
| 48.96 | Emma Blakely | Missoula Sentinel (AA) | 10 | Western Montana Top 10 |
| 48.96 | Claire Griffin | Billings Senior (AA) | 12 | Eastern AA Divisional |