| Mark | Athlete | School | Year | Meet |
|---|
| 2:17.11 | Avery Gerdes | Huntley Project (B) | 9 | Gold Strike Invitational |
| 2:20.00 | Ireland Johnston | Loyola Sacred Heart (B) | 10 | 6B Districts |
| 2:24.00 | Natalie Wood | Sweet Grass Co./Big Timber (B) | 12 | State B Championship |
| 2:24.22 | Makenzie Sheils | Columbus (B) | 12 | State B Championship |
| 2:24.28 | Astrid McGuire | Lone Peak (B) | 11 | Western C Divisional |
| 2:24.29 | Hallie Neibauer | Chinook (B) | 11 | Northern C Divisional |
| 2:24.54 | Miah Fenno | Manhattan (B) | 12 | State B Championship |
| 2:24.83 | Ellie Baxter | Thompson Falls (B) | 12 | State B Championship |
| 2:25.09 | Larkin Galle | Anaconda (B) | 11 | 6B Districts |
| 2:25.16 | Kameryn Ketcham | Sweet Grass Co./Big Timber (B) | 11 | State B Championship |
| 2:25.71 | Renae Parker | Jefferson/Boulder (B) | 12 | KLH Memorial Invitational |
| 2:25.82 | Tanae Baker | Glasgow (B) | 10 | Wibaux Invitational |
| 2:26.09 | Emily See | Glasgow (B) | 11 | Northern B Divisional |
| 2:26.30 | Bella Jones | Three Forks (B) | 10 | Southern B Divisional |
| 2:27.59 | Gracie Honey | Malta (B) | 11 | Northern B Divisional |