| Mark | Athlete | School | Year | Meet |
|---|
| 39.29 | Treyton Anderson | Beaverhead Co./Dillon (A) | 11 | John Tomich Invitational |
| 39.85 | Joey Visser | Jefferson/Boulder (B) | 11 | State B |
| 39.86 | Braden Morris | Jefferson/Boulder (B) | 11 | State B |
| 40.20 | Drew Klumph | Missoula Sentinel (AA) | 11 | State AA |
| 40.21 | Caleb Bernhardt | Glacier (AA) | 11 | Glacier-Sentinel Dual |
| 40.49 | Alex Turner | Belgrade (AA) | 12 | State AA |
| 40.55 | Ryan DeVries | Billings West (AA) | 12 | Eastern AA Divisional |
| 40.64 | Jacob Pierce | Billings West (AA) | 12 | State AA |
| 40.71 | Tyler Gilman | Gallatin (Bozeman) (AA) | 11 | State AA |
| 40.82 | Daxon Graham | Beaverhead Co./Dillon (A) | 12 | Seeley-Swan Invite #2 |
| 41.05 | Jacob Miller | Billings Senior (AA) | 11 | State AA |
| 41.06 | Dawson Sweat | Broadwater/Townsend (B) | 10 | State B |
| 41.06 | Tate Smith | Twin Bridges (C) | 12 | Seeley-Swan Invite #2 |
| 41.31 | Colter Petre | Helena (AA) | 10 | State AA |
| 41.40 | Jackson Simonson | Great Falls CMR (AA) | 11 | State AA |
| 41.50 | Holt Downey | Butte (AA) | 11 | State AA |
| 41.55 | Joel Demars | Billings West (AA) | 12 | Eastern AA Divisional |
| 42.03 | Owen Reynolds | Red Lodge (B) | 9 | Southern B Divisional |
| 42.10 | Dylan Root | Jefferson/Boulder (B) | 10 | State B |
| 42.19 | Jarrett Wilson | Polson (A) | 10 | Columbia Falls-Polson Dual |
| 42.19 | Bodie Smith | Whitefish (A) | 11 | Western A Divisional |