| Mark | Athlete | School | Year | Meet |
|---|
| 49.54 | Wyatt Barney | Manhattan (B) | 12 | State B |
| 49.58 | Ridger Palma | Loyola Sacred Heart (B) | 11 | Western A-B-C Top 10 |
| 50.50 | Ty Ferguson | Sweet Grass Co./Big Timber (B) | 12 | State B |
| 50.73 | Gavin Vandenacre | Broadwater/Townsend (B) | 11 | State B |
| 50.94 | Michael Swan | Manhattan (B) | 11 | State B |
| 51.02 | Mitchell Burns | Huntley Project (B) | 12 | Park City/Harlowton Invitational |
| 51.08 | Jay Jetmore | Red Lodge (B) | 12 | State B |
| 51.19 | Joshua Butts | Lincoln Co./Eureka (B) | 12 | State B |
| 51.33 | Cadence Waller | Florence-Carlton (B) | 12 | State B |
| 51.53 | Garrett Zimdars | Park City (B) | 12 | Park City/Harlowton Invitational |
| 51.57 | Colby Martinez | Columbus (B) | 11 | Southern B Divisional |
| 51.74 | Gunnar Smith | Lincoln Co./Eureka (B) | 12 | State B |
| 51.94 | Layne Spidel | Saint Ignatius (B) | 12 | Frenchtown Invitational |