| Mark | Athlete | School | Year | Meet |
|---|
| 4:15.04 | Sam Ells | Glacier (AA) | 12 | Archie Roe Invite |
| 4:18.95 | Keagen Crosby | Missoula Sentinel (AA) | 11 | State AA |
| 4:20.97 | Finneas Colescott | Missoula Hellgate (AA) | 11 | Western AA Divisional |
| 4:21.17 | Weston Brown | Bozeman (AA) | 11 | State AA |
| 4:22.48 | Ryan Harrington | Great Falls (AA) | 10 | State AA |
| 4:25.94 | Tanner Klumph | Missoula Sentinel (AA) | 12 | Greg Rice City Meet |
| 4:26.79 | Carson Steckelberg | Gallatin (Bozeman) (AA) | 11 | Eastern AA Divisional |
| 4:26.92 | MacGwyer Palmer | Great Falls (AA) | 11 | Skor DeKam Invite |
| 4:27.96 | Colin Shaules | Missoula Sentinel (AA) | 12 | Flathead-Hellgate-Sentinel Tri |
| 4:28.48 | Jaxon Straus | Billings West (AA) | 11 | Midland Roundtable Top 10 |
| 4:29.52 | Connor Neil | Bozeman (AA) | 12 | Eastern AA Divisional |
| 4:30.40 | Jackson Triepke | Missoula Hellgate (AA) | 12 | Western AA Divisional |
| 4:30.80 | Daniel Wiltse | Missoula Hellgate (AA) | 11 | Western AA Divisional |
| 4:31.05 | Samuel Nash | Belgrade (AA) | 12 | Eastern AA Divisional |
| 4:31.26 | Gabe Felton | Flathead (AA) | 12 | Western AA Divisional |
| 4:31.38 | Seth Petsch | Billings West (AA) | 12 | Billings City Meet |
| 4:31.44 | Mason Moler | Billings West (AA) | 10 | Billings City Meet |
| 4:32.30 | Nathan Neil | Bozeman (AA) | 10 | Billings West-Bozeman Dual |
| 4:32.77 | Ridley Key | Missoula Hellgate (AA) | 9 | Western AA Divisional |
| 4:34.54 | Chase Green | Missoula Sentinel (AA) | 12 | Greg Rice City Meet |
| 4:34.87 | Henry Sund | Helena (AA) | 9 | Western AA Divisional |
| 4:35.12 | Henry Ballinger | Helena Capital (AA) | 11 | Glacier-Capital Dual |
| 4:35.82 | Micah Abrams | Billings West (AA) | 12 | Billings City Meet |
| 4:38.58 | Kesler Hughes | Flathead (AA) | 12 | Western AA Divisional |
| 4:39.30 | Wyatt May | Bozeman (AA) | 12 | Midland Roundtable Top 10 |