| Mark | Athlete | School | Year | Meet |
|---|
| 56.07 | Avery Gerdes | Huntley Project (B) | 11 | Midland Roundtable Top 10 |
| 56.84 | Peyton Frame | Custer Co./Miles City (A) | 11 | Midland Roundtable Top 10 |
| 57.83 | Hazel Bishop | Helena (AA) | 11 | Great Falls Optimist Club Invitational |
| 58.11 | Madilyn Todorovich | Helena (AA) | 12 | Great Falls/Helena Dual |
| 58.14 | Rachael Wilmot | Whitefish (A) | 12 | Western A Divisional |
| 58.15 | Anneliese Bessette | Missoula Hellgate (AA) | 12 | Great Falls Optimist Club Invitational |
| 58.16 | Regan Torgerson | Shelby (B) | 10 | Northern B Divisional |
| 58.38 | Sophia Berry | Loyola Sacred Heart (B) | 10 | Western B/C Divisional |
| 58.40 | Isabel Ross | Gallatin (Bozeman) (AA) | 12 | Bozeman Crosstown Dual |
| 58.48 | Macy Brandon | Havre (A) | 11 | Glendive Shriners Invitational |
| 58.67 | Aliyah Vogel | Billings West (AA) | 11 | Great Falls Optimist Club Invitational |
| 59.07 | Kaitlyn Dantic | Laurel (A) | 12 | Midland Roundtable Top 10 |
| 59.15 | Nya Myers | Missoula Big Sky (AA) | 10 | Western AA Divisional |
| 59.31 | Delainey Engen | Billings West (AA) | 12 | Senior/Gallatin/West Triangular |
| 59.45 | Blythe Armstrong | Fergus/Lewistown (A) | 11 | Eastern A Divisional |
| 59.55 | Annalise Lewis | Hamilton (A) | 10 | Nelson-Thomas ABC Meet |
| 59.86 | Emma Ormsby | Billings Senior (AA) | 10 | Midland Roundtable Top 10 |
| 59.87 | Braelynn Mangold | Superior (B) | 12 | Western B/C Divisional |
| 59.88 | Hazel Cooper | Gallatin (Bozeman) (AA) | 10 | Bozeman Crosstown Dual |
| 1:00.05 | Cambry Conradsen | Savage (C) | 12 | Eastern C Divisional |
| 1:00.16 | Carmen Eddy | Glacier (AA) | 12 | Glacier/Flathead Dual |
| 1:00.17 | Mia Swartz | Missoula Sentinel (AA) | 10 | Western AA Divisional |
| 1:00.21 | Charley Nissen | Chinook (B) | 8 | Northern B Divisional |
| 1:00.35 | Alex Bonini | Billings West (AA) | 11 | Billings City Meet |
| 1:00.55 | Natalie Hodgskiss | Choteau (B) | 10 | Northern B Divisional |
| 1:00.72 | Heather Haskins | Frenchtown (A) | 12 | Nelson-Thomas ABC Meet |
| 1:00.72 | Hailey Berwick | Bainville (C) | 11 | Norm Girard Top 10 Track Meet |
| 1:00.74 | Morgan Taylor | Shepherd (B) | 11 | Southern B/C Divisional |
| 1:00.80 | Shae Gooden | Frenchtown (A) | 12 | MCPS Invitational |
| 1:00.89 | Shaylee Weidow | Corvallis (A) | 12 | MCPS Invitational |
| 1:00.94 | Finley Samuels | Gallatin (Bozeman) (AA) | 10 | CMR/Gallatin Dual |
| 1:00.96 | Demry Boyd | Billings West (AA) | 11 | Senior/Gallatin/West Triangular |
| 1:01.00 | Clara Bishop | Missoula Sentinel (AA) | 10 | MCPS Invitational |
| 1:01.04 | Leah Roberts | Billings Skyview (AA) | 9 | Dan Hansen Invitational (WY) |
| 1:01.06 | TJ Chirrick | Roberts (C) | 12 | 5C/6C District Meet |
| 1:01.13 | Ryleigh Kleinke | Sidney (A) | 12 | Fairview HS Invite |
| 1:01.19 | Carly Buxbaum | Fairview (B) | 12 | Fairview HS Invite |
| 1:01.21 | Grace Marshal | Missoula Big Sky (AA) | 11 | Missoula "Greg Rice" City Meet |
| 1:01.27 | Ireland Johnston | Loyola Sacred Heart (B) | 12 | Western B/C Divisional |
| 1:01.37 | Odessa Glade | Custer Co./Miles City (A) | 10 | Hardin SCAD #2 |
| 1:01.40 | Abby Boyd | Melstone (C) | 10 | Harlo/Park City Meet |
| 1:01.52 | Ginger Bergland | Whitefish (A) | 9 | Bigfork/Columbia Falls/Whitefish Tri |
| 1:01.53 | Dacia Benkelman | Glacier (AA) | 11 | Western AA Divisional |
| 1:01.58 | Avery Eckert | Manhattan (B) | 11 | 5B/12C District Meet |
| 1:01.62 | Elizabeth Urban | Helena Capital (AA) | 10 | Western AA Divisional |
| 1:01.63 | Gwendalyn Clingan | Belgrade (AA) | 12 | Midland Roundtable Top 10 |
| 1:01.79 | Isabella Donaghey | Gallatin (Bozeman) (AA) | 11 | CMR/Gallatin Dual |
| 1:01.83 | Addy Lorash | Columbus (B) | 12 | Southern B/C Divisional |
| 1:01.85 | Avery Stulc | Billings Senior (AA) | 9 | Yellowstone Bank Freshman Meet |
| 1:01.93 | Vannie Urick | Belt (C) | 10 | Golden Eagle Invite |
| 1:01.93 | Amelia Stene | Polson (A) | 10 | Whitefish ARM Invitational |
| 1:01.93 | Shelbi LaBrie | Whitewater (C) | 12 | Eastern C Divisional |
| 1:01.94 | Ashley Andrews | Columbia Falls (A) | 11 | Bigfork/Columbia Falls/Whitefish Tri |
| 1:01.94 | Bridget Reed | Turner (C) | 11 | Norm Girard Top 10 Track Meet |
| 1:01.95 | Kate Nasner | Circle (C) | 8 | Fairview HS Invite |
| 1:01.98 | Averi Riedel | Fairview (B) | 10 | Northern B Divisional |