| Mark | Athlete | School | Year | Meet |
|---|
| 4:13.55 | Duncan Hamilton | Bozeman (AA) | 12 | State AA |
| 4:15.05 | Isaac Schmidt | Missoula Hellgate (AA) | 12 | State AA |
| 4:18.49 | Ben Perrin | Flathead (AA) | 11 | Western AA Divisional |
| 4:21.61 | Braden Stremcha | Great Falls CMR (AA) | 12 | State AA |
| 4:22.52 | Teagan Olson | Great Falls (AA) | 12 | Great Falls City Meet |
| 4:26.56 | Dylan Humberger | Bozeman (AA) | 12 | State AA |
| 4:27.37 | Ian Curtis | Missoula Hellgate (AA) | 10 | State AA |
| 4:29.75 | Will Dauenhauer | Missoula Hellgate (AA) | 12 | Western AA Divisional |
| 4:30.15 | Leonard McComas | Bozeman (AA) | 12 | Midland Roundtable Top 10 |
| 4:30.33 | Joseph Vanden Bos | Glacier (AA) | 12 | Western AA Divisional |
| 4:32.39 | Cooper West | Great Falls CMR (AA) | 12 | Billings Skyview Triangular |
| 4:32.87 | Aren Alexander-Battee | Glacier (AA) | 11 | Western AA Divisional |
| 4:33.03 | Elijah Boyd | Glacier (AA) | 12 | Whitefish ARM Invitational |
| 4:34.51 | Simon Hill | Glacier (AA) | 10 | Western AA Divisional |
| 4:35.87 | Griffin May | Bozeman (AA) | 10 | Midland Roundtable Top 10 |
| 4:37.34 | Gordon Gentry | Great Falls CMR (AA) | 11 | Great Falls City Meet |
| 4:39.89 | John Calvin Quindry | Missoula Sentinel (AA) | 11 | Western AA Divisional |