| Mark | Athlete | School | Year | Meet |
|---|
| 43.79 | Morgan Evans | Great Falls (AA) | 11 | State AA |
| 44.48 | Hannah Coburn | Missoula Big Sky (AA) | 12 | State AA |
| 45.05 | Alexa Arthun | Manhattan (B) | 11 | MidLand Round Table Top Ten |
| 45.31 | Audri Demars | Billings West (AA) | 11 | State AA |
| 45.46 | Sophia Stiles | Malta (B) | 11 | State B |
| 45.50 | Jewlz Collins | West Yellowstone (C) | 12 | State C |
| 45.66 | Julia Zidack | Bozeman (AA) | 12 | State AA |
| 45.81 | Brittney Marosok | Billings West (AA) | 12 | Eastern AA Divisionals |
| 45.82 | Mattison McAnaly | Bigfork (B) | 12 | State B |
| 45.91 | Michaela Johnson | Billings West (AA) | 12 | MidLand Round Table Top Ten |
| 45.96 | Wrenzi Wrzesinski | Ennis (C) | 9 | State C |
| 46.06 | Pipi Eitel | Belgrade (AA) | 11 | State A |
| 46.18 | Syd Steele | Missoula Sentinel (AA) | 11 | State AA |
| 46.40 | Kailee Stoppel | Billings West (AA) | 10 | Eastern AA Divisionals |
| 46.61 | Shelby Philipps | Great Falls CMR (AA) | 11 | State AA |
| 46.67 | Ahna Kreitinger | Glacier (AA) | 11 | Glacier v. Great Falls Dual |
| 46.77 | Tavy Findon | Billings Senior (AA) | 9 | State AA |
| 47.08 | Scotti Robinson | Baker (B) | 11 | North/East Top 10 |
| 47.09 | Mariah Stoltz | Valier (C) | 12 | State C |
| 47.25 | Maysee Whitney | Billings Senior (AA) | 10 | State AA |
| 47.28 | Taya Defrance | Harrison (C) | 12 | State C |
| 47.30 | Desiree Scott | Bridger (C) | 9 | State C |
| 47.35 | Megan Pendergast | Stevensville (A) | 10 | State A |
| 47.45 | Shey Hannum | Thompson Falls (B) | 12 | District 7B |
| 47.60 | Payton Durocher | Choteau (B) | 11 | State B |
| 47.67 | Kaitlyn Casazza | Columbia Falls (A) | 11 | State A |
| 47.72 | Kaitlyn Bird | Fort Benton (C) | 11 | State C |
| 47.74 | Jaley Wyse | Dawson Co./Glendive (A) | 10 | State A |
| 47.85 | Josie D'Agostino | Bozeman (AA) | 12 | MidLand Round Table Top Ten |
| 47.93 | Carrie Cota | Roundup (B) | 12 | State B |
| 47.94 | Elsa Sveen | Bozeman (AA) | 11 | Butte Invite |
| 47.97 | Allie Schulz | Whitefish (A) | 12 | ABC Invitational |
| 48.27 | Ciera Wingo | Granite/Philipsburg (C) | 12 | 13C Districts |
| 48.33 | Ashley McElmurry | Missoula Sentinel (AA) | 9 | Greg Rice Missoula City Meet |
| 48.36 | Abigail Harmon | Helena Capital (AA) | | State AA |
| 48.40 | Teresa Patten | Helena Capital (AA) | 12 | State AA |
| 48.41 | Tessa Burke | Loyola Sacred Heart (B) | 10 | Western B Divisonal |
| 48.57 | Joselyn Ketchum | Billings Senior (AA) | 9 | Yellowstone Bank Freshman Invitational |
| 48.67 | Marissa James | Fergus/Lewistown (A) | 10 | State A |
| 48.71 | Mikayla Jefferson | Hardin (A) | 12 | Eastern A Divisional |
| 48.75 | Logan Huebsch | Havre (A) | 10 | Whitefish A.R.M. |
| 48.79 | Ember Drivdahl | Hobson (C) | 12 | Northern C Divisional |
| 48.80 | Sara Anderson | Belt (C) | 11 | State C |
| 48.85 | Katie Ellig | Bozeman (AA) | 10 | Eastern AA Divisionals |
| 48.93 | Ellie DeWan | Whitefish (A) | 10 | ABC Invitational |
| 48.95 | Kamryn Scully | Powell Co./Deer Lodge (B) | 9 | State B |
| 48.97 | Shelby Branstetter | Park City (C) | 11 | State C |
| 48.98 | Marley Manoukian | Malta (B) | 12 | North/East B Divisional |
| 49.00 | Cheyenne Nagy | Charlo (C) | 11 | Western C Divisonal |