| Mark | Athlete | School | Year | Meet |
|---|
| 48.81 | Logan Harwood | Whitefish (A) | 12 | State A |
| 49.57 | Kyle Nickol | Helena Capital (AA) | 11 | Helena Crosstown Meet |
| 49.57 | Alex Klatt | Billings Senior (AA) | 12 | Butte Triangular |
| 49.82 | Nate Vanderby | Manhattan (B) | 12 | Southern B Divisional |
| 49.91 | Luke Hill | Dawson Co./Glendive (A) | 10 | State A |
| 50.21 | Jacob Kvilhaug | Billings West (AA) | 12 | State AA |
| 50.22 | Brock Butcher | Fergus/Lewistown (A) | 10 | State A |
| 50.28 | Parker McCafferty | Belt (C) | 10 | State C |
| 50.32 | Evan Epperly | Glacier (AA) | 11 | State AA |
| 50.53 | Colin Dolese | Missoula Hellgate (AA) | 11 | Missoula Sentinel Quad |
| 50.63 | Jon Nissen | Laurel (A) | 12 | State A |
| 50.66 | Sterling Reneau | Missoula Sentinel (AA) | 11 | Western Montana Top 10 |
| 50.81 | Jesse Pfertsh | Twin Bridges (C) | 12 | Western Montana Top 10 |
| 50.85 | Quinn Staats | Missoula Sentinel (AA) | 12 | State AA |
| 50.91 | Colter Porter | Billings West (AA) | 12 | 5/4 Skyview Triangular |
| 50.95 | Dylan Surber | Chinook (C) | 12 | State C |
| 51.12 | Jadin Casey | Stevensville (A) | 10 | Southwestern A Divisional |
| 51.16 | Alex Mustard | Missoula Big Sky (AA) | 11 | 4/26 Big Sky Quad |
| 51.19 | Iaian Cameron | Whitefish (A) | 12 | State A |
| 51.21 | Karill Apendaile | Hamilton (A) | 10 | State A |
| 51.27 | Andy Nordstrom | Red Lodge (B) | 11 | State B |
| 51.28 | Luke Cardon | Whitefish (A) | 10 | State A |
| 51.30 | Ladan Ricketts | Park/Livingston (A) | 9 | State A |
| 51.30 | Ryan McKinney | Fergus/Lewistown (A) | 11 | State A |
| 51.32 | Jory Fisher | White Sulphur Springs (C) | 11 | Western C Divisional |
| 51.38 | Tyler Roush | Billings West (AA) | 11 | Swede Dahlberg Invitational |
| 51.38 | Austin Storle | Dutton-Brady (C) | 11 | State C |
| 51.40 | Jacob Stanton | Billings Central (A) | 12 | Eastern A Divisional |
| 51.40 | Logan Laird | Billings West (AA) | 11 | State AA |
| 51.46 | Tyler Delaney | Charlo (C) | 11 | State C |
| 51.50 | Mason Pugsley | Bozeman (AA) | 12 | 5/4 Skyview Triangular |
| 51.51 | Sean Laughnan | Missoula Sentinel (AA) | 11 | Missoula Sentinel Quad |
| 51.66 | Mason Carle | Billings Skyview (AA) | 10 | 3/28 Skyview Trianglar |
| 51.74 | Dalton Brookie | Malta (B) | 12 | Northern B Divisional |
| 51.75 | Preston Schubert | Thompson Falls (B) | 12 | Western B Divisional |
| 51.78 | Chris Lords | Stevensville (A) | 11 | State A |
| 51.78 | Kyle Cochran | Helena (AA) | 11 | Western Montana Top 10 |
| 51.82 | Chase Fossum | Glasgow (B) | 10 | Northern B Divisional |
| 51.88 | Monty Rowland | Colstrip (B) | 12 | Southern B Divisional |
| 51.92 | Luke Kazlauskus | Columbia Falls (A) | 12 | State A |
| 51.93 | Wyatt Pannabecker | Choteau (B) | 11 | State B |