| Mark | School | Meet |
|---|
| 47.90 | Whitefish (A) | State A Championship |
| 48.31 | Havre (A) | State A Championship |
| 49.15 | Corvallis (A) | Corvallis Quad |
| 49.72 | Laurel (A) | State A Championship |
| 50.21 | Frenchtown (A) | State A Championship |
| 50.38 | Hamilton (A) | State A Championship |
| 50.52 | Custer Co./Miles City (A) | State A Championship |
| 50.59 | Lockwood (A) | Eastern A Divisional |
| 51.08 | Beaverhead Co./Dillon (A) | State A Championship |
| 51.31 | Columbia Falls (A) | State A Championship |
| 51.61 | Fergus/Lewistown (A) | State A Championship |
| 51.80 | Dawson Co./Glendive (A) | Glendive Shriners Invitational |
| 51.97 | Bigfork (A) | State A Championship |
| 52.16 | Sidney (A) | Eastern A Divisional |
| 52.21 | Billings Central (A) | Eastern A Divisional |