| Mark | School | Meet |
|---|
| 48.18 | Billings Skyview (AA) | State AA Championship |
| 48.91 | Whitefish (A) | State A Championship |
| 48.93 | Helena (AA) | Russ Plicher Top 10 |
| 49.05 | Gallatin (Bozeman) (AA) | State AA Championship |
| 49.29 | Billings Senior (AA) | Eastern AA Divisional |
| 49.34 | Missoula Hellgate (AA) | State AA Championship |
| 49.73 | Flathead (AA) | State AA Championship |
| 49.87 | Laurel (A) | State A Championship |
| 50.00 | Fergus/Lewistown (A) | State A Championship |
| 50.00 | Havre (A) | State A Championship |
| 50.01 | Missoula Sentinel (AA) | State AA Championship |
| 50.02 | Corvallis (A) | State A Championship |
| 50.03 | Missoula Big Sky (AA) | Western AA Divisional |
| 50.04 | Billings West (AA) | West-Skyview Dual |
| 50.24 | Manhattan Christian (C) | State C Championship |
| 50.33 | Helena Capital (AA) | State AA Championship |
| 50.40 | Bozeman (AA) | Eastern AA Divisional |
| 50.42 | Huntley Project (B) | State B Championship |
| 50.57 | Loyola Sacred Heart (B) | State B Championship |
| 50.67 | Beaverhead Co./Dillon (A) | State A Championship |
| 50.68 | Conrad (B) | State B Championship |
| 50.70 | Great Falls CMR (AA) | Eastern AA Divisional |
| 50.71 | Anaconda (B) | State B Championship |
| 50.74 | Savage (C) | State C Championship |
| 50.76 | Hamilton (A) | State A Championship |
| 50.90 | Fairview (B) | State C Championship |
| 51.01 | Columbia Falls (A) | Nelson-Thomas ABC Meet |
| 51.06 | Great Falls (AA) | Eastern AA Divisional |
| 51.06 | Frenchtown (A) | State A Championship |
| 51.07 | Belgrade (AA) | Eastern AA Divisional |
| 51.13 | Twin Bridges (C) | State C Championship |
| 51.21 | Bigfork (A) | State B Championship |
| 51.32 | Shepherd (B) | State B Championship |
| 51.34 | Broadwater/Townsend (B) | Helena Small Schools Meet |
| 51.38 | Dawson Co./Glendive (A) | Eastern A Divisional |
| 51.39 | Superior (C) | Western C Divisional |
| 51.40 | Jefferson/Boulder (B) | Northern B Divisional |
| 51.46 | Plentywood (C) | State C Championship |
| 51.73 | Lockwood (A) | Eastern A Divisional |
| 51.80 | Glacier (AA) | Great Falls-Glacier Dual |
| 51.86 | Highwood (C) | Northern C Divisional |
| 52.04 | Stevensville (A) | Nelson-Thomas ABC Meet |
| 52.07 | Cascade (C) | State C Championship |
| 52.15 | Ennis (B) | State C Championship |
| 52.21 | Butte (AA) | Western AA Divisional |
| 52.26 | Florence-Carlton (B) | State B Championship |
| 52.41 | Sweet Grass Co./Big Timber (B) | State B Championship |
| 52.49 | Lincoln Co./Eureka (B) | State B Championship |
| 52.50 | Whitehall (B) | State B Championship |
| 52.54 | Baker (B) | State B Championship |
| 52.54 | Twin Bridges (C) | John Cheek Top 8 |
| 52.58 | Drummond (C) | Western C Divisional |
| 52.62 | Forsyth (C) | Southern B Divisional |
| 52.65 | Billings Central (A) | John Polich Invitational |
| 52.85 | Cut Bank (B) | Northern B Divisional |
| 52.88 | Glasgow (B) | Northern B Divisional |
| 52.89 | Dawson Co./Glendive (A) | Glendive Elks Invitational |
| 52.94 | Columbus (B) | Southern B Divisional |
| 52.94 | Darby (B) | 13C Districts |
| 52.99 | Sidney (A) | Eastern A Divisional |