| Mark | Athlete | School | Year | Meet |
|---|
| 42.94 | Olivia Lewis | Corvallis (A) | 11 | Western A Divisional |
| 43.06 | Taylee Chirrick | Roberts (C) | 11 | State C Championship |
| 45.50 | Olivia Collins | Gallatin (Bozeman) (AA) | 12 | Eastern AA Divisional |
| 45.50 | Brayli Reimer | Red Lodge (B) | 12 | State B Championship |
| 45.54 | Ellie Aron | Highwood (C) | 12 | State C Championship |
| 45.55 | Ayla Janzen | Twin Bridges (C) | 11 | State C Championship |
| 45.75 | Madilyn Todorovich | Helena (AA) | 10 | State AA Championship |
| 46.01 | Havyn Vandenacre | Broadwater/Townsend (B) | 11 | Southern B Divisional |
| 46.01 | Hailey Ells | Whitefish (A) | 11 | State A Championship |
| 46.02 | Zoey Bortz | Flathead (AA) | 10 | State AA Championship |
| 46.22 | Cienna Soens | Billings Skyview (AA) | 11 | Midland Roundtable Top 10 |
| 46.59 | Aizalyn Flaten | Great Falls CMR (AA) | 9 | State AA Championship |
| 46.60 | Claire Bucklin | Sunburst (C) | 11 | State C Championship |
| 46.61 | Alivia Rinehart | Flathead (AA) | 10 | State AA Championship |
| 46.66 | Annie Kaul | Plentywood (C) | 12 | State C Championship |
| 46.67 | Kathryn Sheridan | Helena Capital (AA) | 11 | Skor DeKam Invite |
| 46.78 | Rylee Herbstritt | Corvallis (A) | 12 | Hamilton Triangular |
| 46.82 | Shaylee Quenzer | Red Lodge (B) | 11 | State B Championship |
| 46.88 | Mady Willis | Scobey (C) | 10 | State C Championship |
| 46.90 | Isabelle Berry | Loyola Sacred Heart (B) | 11 | State B Championship |
| 46.94 | Kara Reed | Denton-Geyser-Stanford (C) | 12 | State C Championship |
| 46.99 | Emma Konen | Twin Bridges (C) | 11 | Western C Divisional |
| 47.11 | Holly Hauptman | Drummond (C) | 12 | State C Championship |
| 47.17 | Rylee Armstrong | Fergus/Lewistown (A) | 12 | State A Championship |
| 47.50 | Blythe Armstrong | Fergus/Lewistown (A) | 9 | State A Championship |
| 47.51 | Isabelle Linder | Helena Capital (AA) | 11 | Capital-CMR Dual |
| 47.55 | Bridget Reed | Turner (C) | 9 | State C Championship |
| 47.59 | Mikayla Hall | Helena Capital (AA) | 12 | Western AA Divisional |
| 47.63 | Aley Aller | Sweet Grass Co./Big Timber (B) | 11 | Al Walker Memorial |
| 47.74 | Heidi Phalen | Custer Co./Miles City (A) | 11 | State A Championship |
| 48.02 | Allie Dale | Twin Bridges (C) | 11 | Western C Divisional |
| 48.08 | Gracelee Banna | Missoula Big Sky (AA) | 10 | Greg Rice City Meet |
| 48.10 | Hope Gonsioroski | Baker (B) | 10 | State B Championship |
| 48.13 | Grace Hicks | Fergus/Lewistown (A) | 9 | State A Championship |
| 48.39 | Hope Madill | Great Falls CMR (AA) | 11 | State AA Championship |
| 48.44 | Amaya Jarvis | Havre (A) | 9 | Norm Girard North/East Top 10 |
| 48.45 | Tia Baker | Columbia Falls (A) | 9 | Western A Divisional |
| 48.46 | Bella Triemstra | Manhattan Christian (C) | 10 | Midland Roundtable Top 10 |
| 48.47 | Bailey Gable | Glacier (AA) | 11 | Russ Plicher Top 10 |
| 48.58 | Jane Harrison | Dawson Co./Glendive (A) | 11 | Eastern A Divisional |
| 48.64 | Audrey Sampsen | Plentywood (C) | 11 | State C Championship |
| 48.69 | Natalie Anderson | Darby (B) | 9 | Western C Divisional |
| 48.71 | Samantha Schiuchetti | Fergus/Lewistown (A) | 11 | State A Championship |
| 48.76 | Katie Reimer | Red Lodge (B) | 10 | State B Championship |
| 48.82 | Jaycee Luse | Cut Bank (B) | 9 | Northern B Divisional |
| 48.84 | Emilee Searle | Hamilton (A) | 9 | Hamilton Triangular |
| 48.91 | Madison O'Connor | Baker (B) | 9 | 3B Districts |
| 48.91 | Aurora Smith | Libby (A) | 12 | Western A Divisional |