| HOME | 400 meters | 52 | |||
| Time | Converted/FAT | Name | School | Class | Year |
| 49.2 | 49.44 | Josh Pelczar | West | AA | 11 |
| 49.77 | Kaleob Palmer | Butte | AA | 11 | |
| 49.97 | Logan Mossey | Lewistown | A | 12 | |
| 49.8 | 50.04 | Bryce Shows | Ennis | C | 12 |
| 50.20 | Seth Marshall | Laurel | A | 10 | |
| 50.50 | David Beery | Belgrade | A | 12 | |
| 50.50 | Bo McGurran | Cascade | B | 12 | |
| 50.4 | 50.64 | Zack Rowan | Libby | A | 12 |
| 50.6 | 50.84 | Presley Armstrong | Eureka | B | 12 |
| 50.97 | Casey Lamping | Capital | AA | 12 | |
| 51.08 | Anto Daoud | Whitefish | A | 10 | |
| 51.4 | 51.11 | Brandon Pierce | Skyview | AA | 11 |
| 50.9 | 51.14 | David Wilson | CMR | AA | 10 |
| 51.28 | Colt Kirkpatrick | Broadview-Lavina | C | 12 | |
| 51.28 | Kazz Siewing | Hinsdale-Saco | C | 12 | |
| 51.29 | Tyler Patenaude | West | AA | 11 | |
| 51.1 | 51.34 | Evan Etchart | Glasgow | B | 11 |
| 51.1 | 51.34 | Myles Jessop | Corvalis | A | 12 |
| 51.44 | Patrick Casey | Laurel | A | 12 | |
| 51.2 | 51.44 | Bryce Carver | Dillon | A | 11 |
| 51.45 | Derek Ohs | Glendive | A | 11 | |
| 51.55 | Kruiz Siewing | Hinsdale-Saco | C | 12 | |
| 51.68 | Jake Glasman | Glacier | AA | 11 | |
| 51.6 | 51.84 | David Repke | Superior | C | 12 |
| 51.7 | 51.94 | Tyzer Cady | Colstrip | B | 12 |
| 51.8 | 52.04 | Cole Hinnaland | Circle | C | 11 |
| 52.04 | Jordan Klatt | Senior | AA | 10 | |
| 52.07 | Fritz Mehling | West | AA | 12 | |
| 51.9 | 52.14 | Chip Goodrich | Bozeman | AA | 11 |
| 51.9 | 52.14 | Ryan Ketterling | Joliet | C | 11 |
| 51.9 | 52.14 | Ryan Turley | Hamilton | A | 12 |