| Time | Date | Name | Meet |
|---|---|---|---|
| 51.51 | Jan. 27, 2024 | Garrett Waite | Colorado Mines vs. Adams State |
| 52.17 | Jan. 11, 2020 | Peyton Scherschel | Colorado Mesa vs. Dixie State, Colorado-Mines |
| 55.83 | Dec. 19, 2016 | Jordan Umrysh | Colorado Mines vs. Adams State |
| 55.88 | Dec. 5, 2015 | Justin Dearden | Colorado School of Mines vs. Colorado |
