| Mark | Athlete | School | Year | Meet |
|---|
| 15.47 | Hunter Price | Lincoln Co./Eureka (B) | 12 | Western Montana Top 10 |
| 15.58 | Silas Hasselbrook | Loyola Sacred Heart (B) | 10 | Western B Divisional |
| 15.64 | Izaack Zier | Manhattan (B) | 11 | Gallatin Valley Invitational |
| 15.64 | Nate Vanderby | Manhattan (B) | 11 | Gallatin Valley Invitational |
| 15.84 | Dominique Holt | Thompson Falls (B) | 11 | 7B Districts |
| 15.84 | Kyle Boos | Malta (B) | 12 | State B Track Meet |
| 15.85 | Preston Schubert | Thompson Falls (B) | 11 | Western B Divisional |
| 15.87 | Konner King | Red Lodge (B) | 11 | Southern B Divisional |
| 16.37 | Garth Webster | Park City (B) | 11 | Park City/Harlowton Invitational |