| Mark | Athlete | School | Year | Meet |
|---|
| 4:15.37 | Dawson LaRance | Billings Senior (AA) | 12 | Midland Roundtable Top Ten |
| 4:15.76 | Chase Equall | Bozeman (AA) | 12 | Midland Roundtable Top Ten |
| 4:18.61 | Marshall Beatty | Missoula Sentinel (AA) | 12 | State AA |
| 4:19.44 | Ben Perrin | Flathead (AA) | 10 | Western AA Divisional |
| 4:20.38 | Jaden Anderson | Flathead (AA) | 12 | State AA |
| 4:21.17 | Jacob Grinwis | Belgrade (AA) | 12 | Midland Roundtable Top Ten |
| 4:21.44 | Iain Anderson | Helena (AA) | 12 | State AA |
| 4:22.23 | Riley Collins | Bozeman (AA) | 12 | Bozeman/Butte Dual |
| 4:23.67 | Isaac Schmidt | Missoula Hellgate (AA) | 11 | State AA |
| 4:23.75 | Morris Wecker | Missoula Hellgate (AA) | 12 | Western AA Divisional |
| 4:25.26 | Cooper West | Great Falls CMR (AA) | 11 | CMR/Helena/Belgrade |
| 4:26.56 | Teagan Olson | Great Falls (AA) | 11 | Eastern AA Divisional |
| 4:28.20 | Will Dauenhauer | Missoula Hellgate (AA) | 11 | State AA |
| 4:28.23 | Leonard McComas | Bozeman (AA) | 11 | Midland Roundtable Top Ten |
| 4:28.36 | Joseph Vanden Bos | Glacier (AA) | 11 | Western AA Divisional |
| 4:30.62 | Duncan Hamilton Jr | Bozeman (AA) | 11 | Skyview Quad Senior, Bozeman, Skyview |
| 4:31.07 | Braden Stremcha | Great Falls CMR (AA) | 11 | Great Falls Crosstown Meet |
| 4:33.17 | Bridger Longtine | Helena Capital (AA) | 12 | Western AA Divisional |
| 4:33.99 | Elijah Boyd | Glacier (AA) | 11 | Western AA Divisional |
| 4:34.55 | Peder Rickbeil | Billings Senior (AA) | 12 | Eastern AA Divisional |
| 4:35.55 | Simon Petsch | Billings West (AA) | 12 | Billings Invite |
| 4:36.00 | Mo Scariano | Missoula Hellgate (AA) | 11 | Western AA Divisional |
| 4:36.37 | Finn Bentler | Billings Senior (AA) | 9 | Eastern AA Divisional |
| 4:36.80 | Derek Macfarlane | Flathead (AA) | 12 | Western AA Divisional |
| 4:37.58 | Brock Adkins | Glacier (AA) | 12 | Western AA Divisional |
| 4:39.67 | Gordon Gentry | Great Falls CMR (AA) | 10 | Eastern AA Divisional |
| 4:42.59 | Ethan Wilson | Billings Senior (AA) | 10 | Billings Senior Quad |