| Mark | Athlete | School | Year | Meet |
|---|
| 57.89 | Maddie Brockel | Billings West (AA) | 12 | Eastern AA Divisional |
| 58.14 | Tavy Findon | Billings Senior (AA) | 11 | State AA |
| 58.52 | Annie Hill | Glacier (AA) | 12 | State AA |
| 58.90 | Tiahna Vladic | Billings Senior (AA) | 11 | State AA |
| 59.10 | Whitney Morrison | Missoula Big Sky (AA) | 10 | Western AA Divisional |
| 59.18 | Adrian Schnee | Glacier (AA) | 12 | State AA |
| 59.59 | Bella Pacheco | Belgrade (AA) | 9 | State A |
| 1:00.29 | Madi Provo | Missoula Hellgate (AA) | 11 | Western AA Divisional |
| 1:00.56 | Ally Cleverly | Butte (AA) | 11 | Eastern AA Divisional |
| 1:00.76 | Evelyn Gimurtu | Missoula Sentinel (AA) | 11 | State AA |
| 1:00.79 | Mary Corbett | Bozeman (AA) | 11 | Midland Roundtable Top 10 |
| 1:00.82 | Aleeya Derlatka | Billings Skyview (AA) | 9 | BPS City Meet |
| 1:01.12 | McKinlee Mihelish | Helena Capital (AA) | 10 | Western Top 10 Meet |
| 1:01.13 | Laura Zimmer | Billings Senior (AA) | 10 | State AA |
| 1:01.32 | Jillian Hust | Billings West (AA) | 10 | Eastern AA Divisional |
| 1:01.41 | Madison Boles | Flathead (AA) | 11 | Sentinel-Hellgate-Flathead Tri |
| 1:01.43 | Addi Ekstrom | Bozeman (AA) | 9 | Eastern AA Divisional |
| 1:01.53 | Madison Edwards | Missoula Big Sky (AA) | 11 | Western AA Divisional |
| 1:01.65 | Bridget Boyle | Bozeman (AA) | 11 | BWH/BSR/Bozeman Triangular |
| 1:01.80 | Abigail Harmon | Helena Capital (AA) | 12 | Western AA Divisional |
| 1:01.96 | Lillian Gyde | Missoula Sentinel (AA) | 9 | Western AA Divisional |