| Time | Date | Name | Meet |
|---|---|---|---|
| 1:34.42 | Nov. 20, 2025 | Flaherty, Tierney, Schmidt, Pierson | TYR/CMU Invitational |
| 1:34.59 | Feb. 14, 2025 | Pierson, VanderMeer, Cristal, Tierney | Rocky Mountain Athletic Conference Championships |
| 1:34.93 | Feb. 10, 2023 | Osmun, Selig, Schmidt, Tierney | Rocky Mountain Athletic Conference Championships |
| 1:35.45 | Feb. 17, 2021 | Selig, Bennett, Lomax, Finley | Rocky Mountain Athletic Conference Championships |
| 1:36.46 | Feb. 8, 2017 | Williams, McComas, Berude, Kralovec | Rocky Mountain Athletic Conference Championships |
| 1:36.56 | Feb. 12, 2015 | Erickson, Holloway, Burns, Berude | Rocky Mountain Athletic Conference Championships |
| 1:38.06 | Jan. 2, 2009 | Washington @Arizona |
