| Year | Class 4A/AA | Time | Class 3A/A | Time | |
|---|---|---|---|---|---|
| 2024 | Laramie | 3:44.30 | Lander | 3:40.98 | |
| 2023 | Jackson | 3:37.68 | Lander | 3:46.25 | |
| 2022 | Campbell County | 3:40.45 | Green River | 3:40.23 | |
| 2021 | Laramie | 3:38.41 | Green River | 3:44.38 | |
| 2020 | Laramie | 3:36.36 | Cody | 3:43.72 | |
| 2019 | Laramie | 3:38.13 | Buffalo | 3:42.73 | |
| 2018 | Laramie | 3:35.31 | Lander | 3:43.69 | |
| 2017 | Laramie | 3:33.16 | Lander | 3:48.77 | |
| 2016 | Campbell County | 3:33.65 | Lander | 3:48.40 | |
| 2015 | Campbell County | 3:34.36 | Worland | 3:44.67 | |
| 2014 | Campbell County | 3:40.98 | Jackson | 3:48.28 | |
| 2013 | Campbell County | 3:44.85 | Jackson | 3:42.94 | |
| 2012 | Kelly Walsh | 3:40.12 | Jackson | 3:43.36 | |
| 2011 | Campbell County | 3:37.87 | Lander | 3:50.13 | |
| 2010 | Campbell County | 3:34.40 | Jackson | 3:41.53 | |
| 2009 | Campbell County | 3:38.74 | Lander | 3:45.43 | |
| 2008 | Campbell County | 3:36.40 | Jackson | 3:47.96 | |
| 2007 | Campbell County | 3:38.52 | Jackson | 3:49.68 | |
| 2006 | Campbell County | 3:37.69 | Jackson | 3:48.65 | |
| 2005 | Campbell County | 3:42.53 | Jackson | 3:51.13 | |
| 2004 | Cheyenne Central | 3:39.02 | Newcastle | 3:47.61 | |
| 2003 | Cheyenne Central | 3:40.03 | Newcastle | 3:47.38 | |
| 2002 | Campbell County | 3:39.77 | Newcastle | 3:52.61 | |
| 2001 | Laramie | 3:42.78 | Newcastle | 3:49.41 | |
| 2000 | Campbell County | 3:42.65 | Newcastle | 3:50.55 | |
| 1999 | Campbell County | 3:38.43 | Buffalo | 3:45.77 | |
| 1998 | Cheyenne East | 3:44.44 | Rawlins | 3:46.18 | |
| 1997 | Campbell County | 3:43.13 | Rawlins | 3:48.84 | |
| 1996 | Campbell County | 3:39.17 | Rawlins | 3:53.48 | |
| 1995 | Campbell County | 3:37.83 | Powell | 3:52.38 | |
| 1994 | Campbell County | 3:38.61 | Powell | 3:50.36 | |
| 1993 | Campbell County | 3:43.52 | Lander | 3:52.68 | |
| 1992 | Laramie | 3:44.46 | Lander | 3:53.33 | |
| 1991 | Laramie | 3:56.53 | Lander | 3:55.21 | |
| 1990 | Laramie | 3:51.48 | Newcastle | 3:52.77 | |
| 1989 | Laramie | 3:56.59 | Kemmerer | 4:07.89 | |
| 1988 | Laramie | 3:57.07 | Big Piney | 4:03.80 | |
| 1987 | Laramie | 3:52.27 | Powell | 3:58.50 | |
| 1986 | Laramie | 3:57.73 | Powell | 4:07.58 | |
| 1985 | Laramie | 3:49.54 | Powell | 4:01.76 | |
| 1984 | Sheridan | 3:52.39 | Greybull | 4:04.81 | |
| 1983 | Natrona | 3:43.32 | Greybull | 4:00.04 | |
| 1982 | Natrona | 3:50.54 | Evanston | 4:10.35 | |
| 1981 | Sheridan | 4:20.92 | Douglas | 4:42.95 | **races in meters |
| 1980 | Sheridan | 3:55.52 | Douglas | 4:25.48 | |
| 1979 | Sheridan | 3:55.99 | Douglas | 4:20.77 | |
| 1978 | Sheridan | 3:54.75 | Douglas | 4:18.27 | |
| 1977 (held winter 1978) | Sheridan | 3:57.60 | Douglas | 4:51.53 | **Class A races in meters |
| 1976 (held winter 1977) | Sheridan | 4:30.10 | Green River | 4:59.98 | **races in meters |
| 1975 (held spring 1976) | Laramie | 3:57.58 | Glenrock | 4:39.61 | |
| 1974 (held spring 1975) | Laramie | 4:06.2 | Big Piney | 4:54.8 | |
| 1973 (held spring 1974) | Laramie | 4:14.9 | Green River | 4:45.9 | |
| before 1973 | Not competed |