| Mark | Athlete | School | Year | Meet |
|---|
| 12.40 | Cori Coombe | Joliet (B) | 10 | Midland Roundtable Top 10 |
| 12.52 | Isabelle Berry | Loyola Sacred Heart (B) | 11 | State B Championship |
| 12.71 | Grace Ekness | Shepherd (B) | 12 | Billings Skyview Small Schools Meet |
| 12.73 | Brynn Wandle | Huntley Project (B) | 11 | Midland Roundtable Top 10 |
| 12.93 | Taylor Evans | Conrad (B) | 11 | Mustang Invitational |
| 12.94 | Malea Egan | Colstrip (B) | 12 | Billings Skyview Small Schools Meet |
| 13.00 | Camy Hoiland | Anaconda (B) | 10 | State B Championship |
| 13.00 | Clare Ronayne | Jefferson/Boulder (B) | 11 | 5B Districts |
| 13.01 | Maxine Hoagland | Whitehall (B) | 12 | State B Championship |
| 13.14 | Havyn Vandenacre | Broadwater/Townsend (B) | 11 | District 5B |
| 13.15 | Stephanie Anderson | Cut Bank (B) | 12 | 1B Districts |
| 13.15 | Saraya Afrank | Baker (B) | 11 | State B Championship |