| Mark | Athlete | School | Year | Meet |
|---|
| 9:23.76 | Peyton Summers | Wolf Point (B) | 12 | Norm Girard North/East Top 10 |
| 9:37.47 | Luke Mest | Jefferson/Boulder (B) | 12 | Gallatin Valley Invitational |
| 9:50.82 | Cass Violett | Three Forks (B) | 11 | Van Kuren Invitational (WA) |
| 9:52.29 | Dominic Hurlbert | Jefferson/Boulder (B) | 11 | State B Championship |
| 9:52.62 | Bryon Fanning | Three Forks (B) | 12 | Van Kuren Invitational (WA) |
| 9:57.22 | Kyler Harris | Florence-Carlton (B) | 11 | Blue Devil Invitational |
| 10:03.88 | Ethan Walker | Harlem (B) | 9 | State B Championship |
| 10:04.01 | Elias Vesbach | Columbus (B) | 12 | Gallatin Valley Invitational |
| 10:08.25 | Auston Schellig | Joliet (B) | 10 | State B Championship |