| Mark | Athlete | School | Year | Meet |
|---|
| 4:24.64 | Anthony Schmalz | Hamilton (A) | 12 | Gallatin Valley Invitational |
| 4:31.72 | Ty Mogan | Laurel (A) | 11 | Dan Hansen Invitational (WY) |
| 4:32.04 | Jake Purlee | Corvallis (A) | 12 | Bob Reed-RCIA Invitational |
| 4:32.55 | Sage Schoonen | Beaverhead Co./Dillon (A) | 11 | Western Montana Top 10 |
| 4:35.23 | Aiden Theard | Anaconda (A) | 12 | Southwestern A Divisional |
| 4:35.43 | Cameron Meikle | Hamilton (A) | 10 | Southwestern A Divisional |
| 4:35.95 | Easton Albert | Hamilton (A) | 12 | Southwestern A Divisional |
| 4:37.64 | Emmette DustyBull | Browning (A) | 11 | State A |
| 4:38.44 | Karill Apendaile | Hamilton (A) | 11 | Polson ABC Meet |
| 4:39.53 | Ashton Jones | Dawson Co./Glendive (A) | 10 | Jock Stop Invitational |
| 4:41.65 | Ryan McKinney | Fergus/Lewistown (A) | 12 | Jock Stop Invitational |
| 4:42.14 | Andrew Honken | Frenchtown (A) | 12 | State A |