| Year | Class 4A | Time | Class 3A | Time |
|---|---|---|---|---|
| 2023 | Thunder Basin | 3:30.50 | Evanston | 3:31.99 |
| 2022 | Sheridan | 3:31.13 | ||
| 2021 | Thunder Basin | 3:31.28 | ||
| 2020 | Sheridan | 3:32.27 | ||
| 2019 | Evanston | 3:33.31 | ||
| 2018 | Cheyenne Central | 3:32.23 | ||
| 2017 | Laramie | 3:26.41 | ||
| 2016 | Campbell County | 3:28.81 | ||
| 2015 | Rock Springs | 3:30.77 | ||
| 2014 | Kelly Walsh | 3:26.76 | ||
| 2013 | Campbell County | 3:29.39 | ||
| 2012 | Cheyenne Central | 3:33.14 | ||
| 2011 | Cheyenne Central | 3:32.62 | ||
| 2010 | Green River | 3:34.74 | ||
| 2009 | Campbell County | 3:33.98 | ||
| 2008 | Cody | 3:34.54 | ||
| 2007 | Laramie | 3:35.58 | ||
| 2006 | Campbell County | 3:38.51 |