| HOME | 400 meters | 52 | ||
| Time | Name | School | Class | Year |
| 49.61 | Nathaniel Inmon | Hellgate | AA | 12 |
| 49.81 | Nate Neujahr | West | AA | 11 |
| 50.13 | Tom Cohn | Helena | AA | 12 |
| 50.19 | Gordy Jessup | Corvallis | A | 12 |
| 50.20 | Pete Betcher | Choteau | B | 12 |
| 50.31 | Colton Reid | Colstrip | A | 12 |
| 50.39 | Ryan Dorian | Thompson Falls | B | 12 |
| 50.40 | Eric Johnson | Fairview | C | 12 |
| 50.43 | Cole Pasichnyk | Hamilton | A | 12 |
| 50.44 | Joe Foggin | Shepherd | B | 11 |
| 50.48 | Tony Kazmierczak | Thompson Falls | B | 11 |
| 50.50 | Brandon Schmidt | Plentywood | B | 12 |
| 50.50 | Colby Kinna | Fairfield | B | |
| 50.53 | Kane Russell | Columbus | B | 11 |
| 50.56 | Dave Schelin | Butte | AA | 12 |
| 50.61 | Ryan Dorian | Thompson Falls | B | 12 |
| 50.62 | Devin Schmidt | Columbia Falls | A | 12 |
| 50.62 | Cameron Dean | Huntley-Project | B | 11 |
| 50.81 | Chris Carlson | West | AA | 11 |
| 51.00 | Scott Peterson | Capital | AA | 12 |
| 51.02 | Mason Giem | Dillon | A | 12 |
| 51.19 | Connor Kelley | Anaconda | A | 11 |
| 51.36 | Shawn Schreiber | Harlowton | C | 12 |
| 51.46 | Roman Morris | Whitewater | C | |
| 51.50 | Karl Osterman | Big Sandy | C | 11 |
| 51.52 | Mark Eekhoff | Manhattan Christian | B | 11 |
| 51.58 | Brett Graybeal | Drummond | C | 12 |
| 51.60 | Chris Ogle | Polson | A | 10 |
| 51.64 | Garath Stahl | Grass Range | C | 12 |
| 51.65 | Landon Bowery | Ennis | B | 11 |
| 51.67 | Coby Kinna | Fairfield | B | 10 |
| 51.69 | Tim Anderson | Loyola | B | 12 |
| 51.73 | Ernie Delgado | Twin Bridges | C | 12 |
| 51.79 | Zach Condon | Laurel | A | 10 |
| 51.85 | Scott Harding | Huntley-Project | B | 12 |
| 51.87 | Scott Robinson | Havre | A | 12 |
| 51.90 | Joe Fernandez | Florence | B | 12 |
| 51.97 | Jesse Potter | Stevensville | A | 10 |
| 51.97 | Jacob Pearson | CMR | AA | 12 |
| 51.99 | Reed Watkins | Kalispell | AA | |