| Mark | Athlete | School | Year | Meet |
|---|
| 57.29 | Odessa Zentz | Helena (AA) | 9 | Helena/Capital Crosstown |
| 59.35 | Addi Ekstrom | Bozeman (AA) | 10 | State AA |
| 59.37 | Sydney Sheridan | Helena Capital (AA) | 12 | State AA |
| 59.48 | Brooke Stayner | Missoula Sentinel (AA) | 9 | State AA |
| 59.56 | Mary Corbett | Bozeman (AA) | 12 | Eastern AA Divisionals |
| 59.67 | Maliea Owens | Billings Skyview (AA) | 9 | Midland Roundtable Top 10 |
| 59.96 | Madi Provo | Missoula Hellgate (AA) | 12 | Western Top 10 Meet |
| 1:00.15 | Tiahna Vladic | Billings Senior (AA) | 12 | Eastern AA Divisionals |
| 1:00.32 | Anna Trudnowski | Butte (AA) | 10 | Butte Invite |
| 1:00.36 | Ally Cleverly | Butte (AA) | 12 | Butte Invite |
| 1:00.43 | Cerise Lee | Flathead (AA) | 9 | Western AA Divisional |
| 1:00.49 | McKinlee Mihelish | Helena Capital (AA) | 11 | State AA |
| 1:00.52 | Mackenzie Dean | Great Falls CMR (AA) | 11 | CMR Quadrangular |
| 1:00.63 | Amelia Hartshorn | Bozeman (AA) | 10 | State AA |
| 1:00.70 | Laura Zimmer | Billings Senior (AA) | 11 | State AA |
| 1:00.89 | Chloe Davies | Billings West (AA) | 9 | Billings City Meet |
| 1:00.98 | Tavy Findon | Billings Senior (AA) | 12 | Gary Benson Invitational (WY) |
| 1:01.08 | Jillian Hust | Billings West (AA) | 11 | Bozeman-West-Skyview Triangular |
| 1:01.10 | Mikayla Shinn | Flathead (AA) | 12 | Archie Roe |
| 1:01.16 | Emily Ratz | Missoula Hellgate (AA) | 10 | Western AA Divisional |
| 1:01.33 | Sabryn Knight | Missoula Big Sky (AA) | 10 | Western AA Divisional |
| 1:01.50 | Whitney Morrison | Missoula Big Sky (AA) | 11 | Western Top 10 Meet |
| 1:01.87 | Willa Albrecht | Billings West (AA) | 11 | Billings West Small Schools Meet #2 |
| 1:01.87 | Tori Noland-Gillespie | Flathead (AA) | 10 | Western AA Divisional |