| Mark | Athlete | School | Year | Meet |
|---|
| 4:27.58 | Sage Schoonen | Beaverhead Co./Dillon (A) | 12 | Southwestern A Divisional |
| 4:31.07 | Cameron Meikle | Hamilton (A) | 11 | Southwestern A Divisional |
| 4:31.27 | Ty Mogan | Laurel (A) | 12 | State A |
| 4:32.26 | Ronald Venema | Corvallis (A) | 11 | Southwestern A Divisional |
| 4:32.61 | Emmette Dusty Bull | Browning (A) | 12 | State A |
| 4:33.37 | Austin Stradley | Custer Co./Miles City (A) | 12 | Eastern A Divisional |
| 4:33.55 | Ashton Jones | Dawson Co./Glendive (A) | 11 | Sidney Invitational |
| 4:35.78 | Kole Tison | Hamilton (A) | 12 | Southwestern A Divisional |
| 4:37.38 | Andrew Jessop | Corvallis (A) | 10 | Southwestern A Divisional |
| 4:37.98 | Jacob Rogers | Hamilton (A) | 12 | Southwestern A Divisional |
| 4:38.54 | Jalen Two Leggins | Hardin (A) | 11 | State A |
| 4:42.14 | Carson Jessop | Corvallis (A) | 10 | Bob Reed-RCIA Invitational |
| 4:42.19 | Sage Schoonen | Beaverhead Co./Dillon (A) | 12 | Western Top 10 Meet |
| 4:42.34 | Joel Haas | Corvallis (A) | 10 | Bob Reed-RCIA Invitational |
| 4:43.00 | Tanner Lehr | Hamilton (A) | 12 | Southwestern A Divisional |
| 4:43.92 | Frank Dean | Frenchtown (A) | 10 | Northwestern A Divisional |