| Mark | Athlete | School | Year | Meet |
|---|
| 55.52 | Olivia Lewis | Corvallis (A) | 12 | State A Championship |
| 57.14 | Brooke Zetooney | Whitefish (A) | 12 | State A Championship |
| 57.83 | Rachael Wilmot | Whitefish (A) | 11 | State A Championship |
| 58.24 | Macy Brandon | Havre (A) | 10 | State A Championship |
| 58.44 | Peyton Frame | Custer Co./Miles City (A) | 10 | State A Championship |
| 58.92 | Annalise Lewis | Hamilton (A) | 9 | State A Championship |
| 59.31 | Kaitlyn Dantic | Laurel (A) | 11 | Eastern A Divisional |
| 59.32 | Hailey Ells | Whitefish (A) | 12 | State A Championship |
| 59.79 | Ally Sempf | Columbia Falls (A) | 12 | Archie Roe Invitational |
| 1:00.20 | Heather Haskins | Frenchtown (A) | 11 | State A Championship |
| 1:00.57 | Blythe Armstrong | Fergus/Lewistown (A) | 10 | Eastern A Divisional |
| 1:00.80 | Jenna Ellis | Hamilton (A) | 10 | Russ Plicher Western Top 10 |
| 1:01.16 | Michaela Cary | East Helena (A) | 12 | Eastern A Divisional |
| 1:01.20 | Dani Jordan | Lockwood (A) | 11 | Eastern A Divisional |
| 1:01.49 | Ella Moodry | Butte Central (A) | 12 | Joe Tacke Invitational |
| 1:01.54 | Shae Gooden | Frenchtown (A) | 11 | John Tomich Invitational |
| 1:01.76 | Grace Jagodzinski | Billings Central (A) | 9 | State A Championship |
| 1:01.85 | Emma Buckley | Dawson Co./Glendive (A) | 10 | Glendive Shriners Invitational |