| Mark | Athlete | School | Year | Meet |
|---|
| 48.21 | Kyle Nickol | Helena Capital (AA) | 12 | State AA |
| 48.74 | Sterling Reneau | Missoula Sentinel (AA) | 12 | State AA |
| 49.11 | Colin Dolese | Missoula Hellgate (AA) | 12 | State AA |
| 49.49 | Kyle Cochran | Helena (AA) | 12 | State AA |
| 49.55 | Evan Epperly | Glacier (AA) | 12 | State AA |
| 49.90 | Logan Laird | Billings West (AA) | 12 | State AA |
| 50.04 | Brock Butcher | Fergus/Lewistown (A) | 11 | State A |
| 50.23 | David Keena | Manhattan Christian (C) | 11 | State C |
| 50.25 | Chris Lange | Missoula Big Sky (AA) | 12 | State AA |
| 50.53 | Sean Opland | Troy (B) | 10 | State B |
| 50.55 | Jadin Casey | Stevensville (A) | 11 | Southwestern A Divisional |
| 50.55 | Josh Barrows | Helena (AA) | 11 | CMR-Helena Dual |
| 50.56 | Parker McCafferty | Belt (C) | 11 | State C |
| 50.58 | Kelly Murnion | Garfield Co./Jordan (C) | 10 | State C |
| 50.65 | Danny McLain | Helena Capital (AA) | 12 | State AA |
| 50.66 | Caleb Neth | Manhattan (B) | 10 | State B |
| 50.69 | Karill Apendaile | Hamilton (A) | 11 | Southwestern A Divisional |
| 50.73 | Tyler Delaney | Charlo (C) | 12 | State C |
| 50.96 | Taylor Sylvester | Corvallis (A) | 11 | Polson ABC Meet |
| 51.02 | Dawson LaRance | Billings Senior (AA) | 9 | Eastern AA Divisional |
| 51.05 | Michael Gulledge | Billings Central (A) | 11 | Eastern A Divisional |
| 51.09 | Chase Fossum | Glasgow (B) | 11 | State B |
| 51.19 | Mason Carle | Billings Skyview (AA) | 11 | CMR Triangular |
| 51.21 | Chris Lords | Stevensville (A) | 12 | State A |
| 51.21 | Connor Matthews | Helena (AA) | 10 | Helena Crosstown Meet |
| 51.26 | Jory Fisher | White Sulphur Springs (C) | 12 | Western C Divisional |
| 51.27 | Jeremiah Coon | Helena (AA) | 11 | Small Schools Invitational |
| 51.38 | Chance Maes | Missoula Big Sky (AA) | 11 | Western AA Divisional |
| 51.38 | Ty Rather | Missoula Big Sky (AA) | 12 | Western AA Divisional |
| 51.39 | Michel Miller | Troy (B) | 11 | State B |
| 51.42 | Bill Yeager | Twin Bridges (C) | | State C |
| 51.48 | Caleb Benson | Sidney (A) | 12 | Eastern A Divisional |
| 51.49 | Timmy Dutton | Billings West (AA) | 11 | Eastern AA Divisional |
| 51.53 | Brendan Acheson | Billings Skyview (AA) | 10 | Skyview Triangular 4/11 |
| 51.56 | Clay Dean | Butte (AA) | 11 | Eastern AA Divisional |
| 51.75 | Dakota Pew | Dawson Co./Glendive (A) | 11 | Eastern A Divisional |
| 51.75 | Daniel Pendergast | Stevensville (A) | 11 | Southwestern A Divisional |
| 51.77 | Daryl Williams | Great Falls CMR (AA) | 12 | Eastern AA Divisional |
| 51.80 | Levi Donaldson | Helena Capital (AA) | 11 | Western AA Divisional |
| 51.81 | Luke Cardon | Whitefish (A) | 11 | State A |
| 51.85 | Darren Hecker | Sweet Grass Co./Big Timber (B) | 12 | Southern B Divisional |
| 51.96 | Easton Johnson | Flathead (AA) | 11 | Western AA Divisional |
| 51.98 | Ryan Burger | Helena Capital (AA) | 11 | Western AA Divisional |
| 51.99 | Jake Clarke | Billings Senior (AA) | 11 | State AA |
| 52.03 | McKenzie Holt | Thompson Falls (B) | 9 | State B |