| Mark | Athlete | School | Year | Meet |
|---|
| 38.44 | Aaron Robinson | Glacier (AA) | 12 | State AA |
| 38.82 | Tyler Gurchiek | Billings West (AA) | 11 | MidLand Round Table Top Ten |
| 39.07 | Gabe Sulser | Billings Senior (AA) | 10 | Swede Dahlberg Invitational |
| 39.45 | Jamison Hermanson | Great Falls (AA) | 12 | State AA |
| 39.79 | Connor Dowdy | Helena Capital (AA) | 12 | State AA |
| 40.39 | Maxx Sitzmann | Great Falls (AA) | 12 | Great Falls City Meet |
| 40.41 | Scout Willcut | Glacier (AA) | 11 | Archie Roe |
| 40.46 | Will Hunthausen | Helena Capital (AA) | 12 | State AA |
| 40.59 | Derrick Olsen | Helena (AA) | 11 | Helena Crosstown |
| 40.63 | Bryce Gallagher | Butte (AA) | 11 | State AA |
| 40.95 | Xavier Melice | Helena Capital (AA) | 10 | Great Falls High - Butte - Helena Capital |
| 40.99 | Jacob Grinwis | Belgrade (AA) | 11 | Senior Night |
| 41.42 | Collin Fischer | Missoula Sentinel (AA) | 12 | Greg Rice |
| 41.59 | Chad Hemsley | Flathead (AA) | 10 | Western AA Divisional |
| 41.72 | Dennis Krueger | Missoula Big Sky (AA) | 11 | Greg Rice |
| 41.95 | Ben Hunthausen | Helena Capital (AA) | 10 | Helena Crosstown |
| 41.99 | Ryan Johnson | Great Falls (AA) | 11 | State AA |
| 42.00 | Alec Steele | Missoula Sentinel (AA) | 12 | Western AA Divisional |