| Year | School | Time |
|---|---|---|
| 2022 | Cheyenne Central | 4:19.53 |
| 2021 | Rawlins | 4:19.42 |
| 2020 | Cody | 4:16.66 |
| 2019 | Sheridan | 4:18.51 |
| 2018 | Sheridan | 4:18.83 |
| 2017 | Not contested | |
| 2016 | Not contested | |
| 2015 | Not contested | |
| 2014 | Not contested | |
| 2013 | Not contested | |
| 2012 | Not contested | |
| 2011 | Not contested | |
| 2010 | Not contested | |
| 2009 | Not contested | |
| 2008 | Not contested | |
| 2007 | Not contested | |
| 2006 | Not contested |