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| Year | Class 4A | Time | Class 3A | Time |
| 2026 | Sheridan | 3:37.71 | Cody | 3:40.83 |
| 2025 | Laramie | 3:37.49 | Cody | 3:46.49 |
| 2024 | Cheyenne Central | 3:40.75 | Cody | 3:37.11 |
| 2023 | Cheyenne Central | 3:43.39 | Lander | 3:45.33 |
| 2022 | Sheridan | 3:39.57 | | |
| 2021 | Sheridan | 3:43.38 | | |
| 2020 | Laramie | 3:41.06 | | |
| 2019 | Natrona | 3:44.34 | | |
| 2018 | Rock Springs | 3:39.66 | | |
| 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 | | | |