| Mark | School | Meet |
|---|
| 41.91 | Helena (AA) | Helena Crosstown Meet |
| 42.03 | Billings West (AA) | Midland Roundtable Top 10 |
| 42.19 | Flathead (AA) | Archie Roe Invitational |
| 42.60 | Helena Capital (AA) | MCPS Invitational |
| 42.62 | Missoula Hellgate (AA) | Missoula "Greg Rice" City Meet |
| 42.72 | Gallatin (Bozeman) (AA) | Midland Roundtable Top 10 |
| 42.76 | Missoula Sentinel (AA) | Western AA Divisional |
| 43.01 | Glacier (AA) | Archie Roe Invitational |
| 43.14 | Missoula Big Sky (AA) | Western AA Divisional |
| 43.28 | Billings Skyview (AA) | Billings City Meet |
| 43.46 | Butte (AA) | Western AA Divisional |
| 43.46 | Corvallis (A) | Sapphire Twilight Meet |
| 43.52 | Great Falls (AA) | Great Falls Crosstown Meet |
| 43.58 | Columbus (B) | Southern B/C Divisional |
| 43.61 | Frenchtown (A) | Russ Plicher Western Top 10 |
| 43.75 | Custer Co./Miles City (A) | Eastern A Divisional |
| 43.76 | Bozeman (AA) | Midland Roundtable Top 10 |
| 43.86 | Laurel (A) | Railyard Trials |
| 43.89 | Belgrade (AA) | Eastern AA Divisional |
| 43.90 | Joliet (B) | Midland Roundtable Top 10 |
| 43.93 | Hamilton (A) | Western A Divisional |
| 43.98 | Bigfork (A) | Nelson-Thomas ABC Meet |
| 43.98 | Whitefish (A) | Whitefish ARM Invitational |
| 43.99 | Columbia Falls (A) | Sapphire Twilight Meet |
| 44.01 | Fairview (B) | Northern B Divisional |
| 44.08 | Loyola Sacred Heart (B) | Frenchtown/Loyola |
| 44.15 | Florence-Carlton (B) | Western B/C Divisional |
| 44.23 | Billings Senior (AA) | Billings Invite |
| 44.32 | Jefferson/Boulder (B) | 5B/12C District Meet |
| 44.39 | Malta (B) | Northern B Divisional |
| 44.41 | Manhattan (B) | Southern B/C Divisional |
| 44.54 | Fergus/Lewistown (A) | Midland Roundtable Top 10 |
| 44.67 | Valley Christian (C) | Western B/C Divisional |
| 44.74 | Red Lodge (B) | Gold Strike Invitational |
| 44.76 | Hot Springs (C) | Western B/C Divisional |
| 44.78 | Culbertson (C) | Norm Girard Top 10 Track Meet |
| 44.79 | Billings Central (A) | Eastern A Divisional |
| 44.82 | Baker (B) | 3B/4C District Meet |
| 44.84 | Chester-Joplin-Inverness (C) | Mustang Invite |
| 44.86 | Great Falls CMR (AA) | Capital/CMR Dual |
| 44.87 | Havre (A) | Eastern A Divisional |
| 44.95 | Plentywood (C) | Eastern C Divisional |
| 44.97 | Cascade (C) | Choteau Twilight Meet |
| 45.02 | Fort Benton (C) | 9C District Meet |
| 45.03 | Sidney (A) | Eastern A Divisional |
| 45.03 | Butte Central (A) | Joe Tacke Invitational |
| 45.10 | Glasgow (B) | Norm Girard Top 10 Track Meet |
| 45.11 | Three Forks (B) | Harlo/Park City Meet |
| 45.14 | Hobson-Moore (C) | 8C District Meet |
| 45.17 | Belt (C) | Choteau Acantha Invitational |
| 45.19 | Sweet Grass Co./Big Timber (B) | Southern B/C Divisional |
| 45.24 | Plains (B) | Archie Roe Invitational |
| 45.30 | Highwood (C) | 8C District Meet |
| 45.43 | Conrad (B) | Northern B Divisional |
| 45.46 | Plentywood (C) | Fairview HS Invite |
| 45.46 | Denton-Geyser-Stanford (C) | Red Lodge Classic |