| Mark | Athlete | School | Year | Meet |
|---|
| 48.99 | Ridger Palma | Loyola Sacred Heart (B) | 12 | Western B Divisional |
| 49.68 | Rafe Premo | Great Falls CMR (AA) | 12 | State AA |
| 49.72 | Treyton Anderson | Beaverhead Co./Dillon (A) | 12 | Park High Class A Meet |
| 50.14 | Owen Hoag | Seeley-Swan (C) | 11 | Western C Divisional |
| 50.29 | Nikolas Udstuen | Gallatin (Bozeman) (AA) | 12 | State AA |
| 50.39 | Treyton Graham | Beaverhead Co./Dillon (A) | 11 | State A |
| 50.40 | Michael Swan | Manhattan (B) | 12 | Midland Roundtable Top 10 |
| 50.53 | Colin Shaules | Missoula Sentinel (AA) | 12 | Greg Rice City Meet |
| 50.80 | Keagen Crosby | Missoula Sentinel (AA) | 11 | State AA |
| 50.91 | Gabe Menicke | Whitefish (A) | 12 | State A |
| 50.94 | Clay Oven | Billings Central (A) | 11 | Midland Roundtable Top 10 |
| 50.98 | Eli Taylor | Hamilton (A) | 11 | State A |
| 50.99 | Luca Dombrowski | Loyola Sacred Heart (B) | 11 | Western B Divisional |
| 51.09 | Garrett Nelson | Great Falls (AA) | 12 | Eastern AA Divisional |
| 51.21 | Colter Kirkland | Hamilton (A) | 12 | Hamilton Quad |
| 51.22 | Jake Turner | Glacier (AA) | 12 | Swede Dahlberg Invite |
| 51.22 | Kohbe Smith | Dawson Co./Glendive (A) | 10 | State A |
| 51.24 | Brady Kolendich | Missoula Sentinel (AA) | 10 | Western AA Divisional |
| 51.26 | Jase Applebee | Bozeman (AA) | 12 | Billings West-Bozeman Dual |
| 51.27 | Luke Sullivan | Helena Capital (AA) | 12 | CMR-Capital Dual |
| 51.27 | Malaki Simpson | Columbia Falls (A) | 10 | Western A Divisional |
| 51.31 | Luke Sullivan | Helena Capital (AA) | 12 | Swede Dahlberg Invite |
| 51.33 | Davide Massarutto | Laurel (A) | 12 | State A |
| 51.41 | Nathan Neil | Bozeman (AA) | 10 | Eastern AA Divisional |
| 51.42 | Garrett Schmill | Frenchtown (A) | 12 | Nelson-Thomas ABC Meet |
| 51.46 | Seth Petsch | Billings West (AA) | 12 | Billings City Meet |
| 51.52 | Joseph Ceccacci | Missoula Sentinel (AA) | 12 | State AA |
| 51.64 | Brady Sheldon | Billings West (AA) | 10 | Swede Dahlberg Invite |
| 51.64 | Jeremy Bockus | Browning (A) | 12 | Whitefish-Flathead-Browning Tri |
| 51.64 | Garrett Dahlke | Gallatin (Bozeman) (AA) | 11 | Skor DeKam Invite |
| 51.66 | Jace Lemmel | Roundup (B) | 11 | 4B Districts |
| 51.74 | Rauly Jessop | Corvallis (A) | 11 | State A |
| 51.89 | Derek Criddle | Corvallis (A) | 10 | Western A Divisional |
| 51.93 | Ryan Bucher | Thompson Falls (B) | 12 | 7B Districts |
| 51.94 | Ethan Anderson | Glacier (AA) | 9 | State AA |
| 52.00 | Aiden Lantis | Billings West (AA) | 12 | Billings City Meet |
| 52.09 | Colby Martinez | Columbus (B) | 12 | Southern B Divisional |
| 52.09 | Gavin Vandenacre | Broadwater/Townsend (B) | 12 | Southern B Divisional |
| 52.15 | Jacob Buchignani | Three Forks (B) | 12 | State B |
| 52.32 | Randon Richman | Shelby (B) | 10 | Cascade Top 8 |
| 52.58 | Seth Amunrud | Manhattan Christian (C) | 11 | 12C Districts |
| 52.69 | Devin Bird | Fort Benton (C) | 12 | Northern C Divisional |
| 53.02 | JD Shepard | Belt (C) | 10 | Northern C Divisional |