| Mark | School | Meet |
|---|
| 48.65 | Billings Senior (AA) | State AA Track Meet |
| 48.76 | Great Falls CMR (AA) | State AA Track Meet |
| 49.52 | Missoula Big Sky (AA) | Western AA Divisional |
| 49.59 | Billings Skyview (AA) | Midland Roundtable Top 10 Meet |
| 49.76 | Whitefish (A) | State A Track Meet |
| 50.00 | Corvallis (A) | State A Track Meet |
| 50.06 | Missoula Sentinel (AA) | State AA Track Meet |
| 50.30 | Butte (AA) | Butte Quad |
| 50.33 | Flathead (AA) | Flathead-Glacier Dual |
| 50.48 | Belgrade (AA) | Central A Divisional |
| 50.55 | North Star (C) | State C Track Meet |
| 50.62 | Billings West (AA) | State AA Track Meet |
| 50.68 | Helena (AA) | State AA Track Meet |
| 50.95 | Helena Capital (AA) | Western AA Divisional |
| 51.10 | Manhattan Christian (C) | State C Track Meet |
| 51.14 | Dawson Co./Glendive (A) | State A Track Meet |
| 51.22 | Plains (B) | Western B Divisional |
| 51.49 | Fergus/Lewistown (A) | Central A Divisional |
| 51.51 | Cut Bank (B) | State B Track Meet |
| 51.71 | Missoula Hellgate (AA) | Missoula Quad |
| 51.74 | Glacier (AA) | Whitefish A.R.M. Invitational |
| 51.82 | Powder River Co./Broadus (C) | 3B Districts |
| 51.89 | Hardin (A) | Eastern A Divisional |
| 51.94 | Florence-Carlton (B) | 6B Districts |
| 52.00 | Shepherd (B) | State B Track Meet |
| 52.07 | Polson (A) | Northwestern A Divisional |
| 52.14 | Columbia Falls (A) | Polson ABC Meet |
| 52.16 | Great Falls (AA) | Eastern AA Divisional |
| 52.18 | Loyola Sacred Heart (B) | State B Track Meet |
| 52.23 | Bozeman (AA) | Midland Roundtable Top 10 Meet |
| 52.26 | Billings Central (A) | Eastern A Divisional |
| 52.40 | Shields Valley (C) | 11-12C Districts |
| 52.48 | Sidney (A) | Jock Stop Meet |
| 52.51 | Glasgow (B) | State B Track Meet |
| 52.64 | Charlo (C) | Western C Divisional |
| 52.67 | Joliet (B) | 4B Districts |
| 52.72 | Park/Livingston (A) | State A Track Meet |
| 52.76 | Jefferson/Boulder (B) | State B Track Meet |
| 53.02 | Superior (C) | State C Track Meet |
| 53.04 | Park City (C) | Southern C Divisional |