| Year | School | Time |
|---|---|---|
| 2022 | Sheridan | 1:32.63 |
| 2021 | Campbell County | 1:32.43 |
| 2020 | Kelly Walsh | 1:33.56 |
| 2019 | Sheridan | 1:31.93 |
| 2018 | Cheyenne East | 1:33.95 |
| 2017 | Kelly Walsh | 1:32.70 |
| 2016 | Campbell County | 1:33.54 |
| 2015 | Cheyenne Central | 1:33.47 |
| 2014 | Natrona | 1:33.15 |
| 2013 | Natrona | 1:34.08 |
| 2012 | Campbell County | 1:32.93 |
| 2011 | Not contested | |
| 2010 | Not contested | |
| 2009 | Not contested | |
| 2008 | Not contested | |
| 2007 | Not contested | |
| 2006 | Not contested |