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| Year | Class 4A/AA | Time | Class 3A/A | Time |
| 2024 | Green River | 1:39.20 | Lander | 1:42.69 |
| 2023 | Kelly Walsh | 1:39.36 | Green River | 1:41.24 |
| 2022 | Jackson | 1:39.91 | Lander | 1:41.58 |
| 2021 | Campbell County | 1:38.35 | Lander | 1:43.22 |
| 2020 | Laramie | 1:37.96 | Buffalo | 1:40.69 |
| 2019 | Laramie | 1:37.23 | Buffalo | 1:41.97 |
| 2018 | Laramie | 1:37.04 | Buffalo | 1:41.73 |
| 2017 | Laramie | 1:36.68 | Worland | 1:41.88 |
| 2016 | Campbell County | 1:36.81 | Riverton | 1:43.51 |
| 2015 | Campbell County | 1:37.35 | Worland | 1:41.92 |
| 2014 | Campbell County | 1:39.45 | Jackson | 1:41.86 |
| 2013 | Cheyenne East | 1:43.17 | Jackson | 1:41.47 |
| 2012 | Cheyenne Central | 1:42.53 | Jackson | 1:45.40 |
| 2011 | Kelly Walsh | 1:40.88 | Lander | 1:44.76 |
| 2010 | Campbell County | 1:41.33 | Lander | 1:42.25 |
| 2009 | Campbell County | 1:40.76 | Jackson | 1:43.94 |
| 2008 | Cheyenne Central | 1:40.50 | Jackson | 1:44.05 |
| 2007 | Campbell County | 1:43.37 | Jackson | 1:44.06 |
| 2006 | Kelly Walsh | 1:41.26 | Jackson | 1:43.95 |
| 2005 | Campbell County | 1:41.09 | Jackson | 1:45.81 |
| 2004 | Cheyenne Central | 1:39.42 | Newcastle | 1:43.70 |
| 2003 | Campbell County | 1:40.76 | Newcastle | 1:46.58 |
| 2002 | Campbell County | 1:39.41 | Newcastle | 1:44.35 |
| 2001 | Riverton | 1:42.04 | Newcastle | 1:43.06 |
| 2000 | Laramie | 1:42.26 | Rawlins | 1:45.63 |
| 1999 | Campbell County | 1:39.16 | Buffalo | 1:41.94 |
| 1998 | Campbell County | 1:40.81 | Rawlins | 1:43.51 |
| 1997 | Campbell County | 1:42.93 | Rawlins | 1:44.55 |
| 1996 | Campbell County | 1:41.40 | Buffalo | 1:45.84 |
| 1995 | Campbell County | 1:39.77 | Lander | 1:45.61 |
| 1994 | Campbell County | 1:38.48 | Powell | 1:45.80 |
| 1993 | Campbell County | 1:41.81 | Powell | 1:44.76 |
| 1992 | Campbell County | 1:41.63 | Douglas | 1:45.35 |
| 1991 | Rock Springs | 1:47.81 | Newcastle | 1:45.42 |
| 1990 | Rock Springs | 1:45.25 | Kemmerer | 1:47.07 |
| 1973 to 1989 | Not competed | | Not competed | |
| 1972 (fall) | Laramie | 1:52.3 | - | - |
| 1971 (spring) | Laramie | 1:54.4 | - | - |
| 1970 (spring) | Not competed | | - | - |