| Year |
Champion |
Record |
| 1963 |
Idaho State |
3-1 |
| 1964 |
Montana State |
3-0 |
| 1965 |
Weber State/Idaho |
3-1 |
| 1966 |
Montana State |
4-0 |
| 1967 |
Montana State |
4-0 |
| 1968 |
Weber State/Montana State/Idaho |
3-1 |
| 1969 |
Montana |
4-0 |
| 1970 |
Montana |
5-0 |
| 1971 |
Idaho |
4-1 |
| 1972 |
Montana State |
5-1 |
| 1973 |
Boise State |
6-0 |
| 1974 |
Boise State |
6-0 |
| 1975 |
Boise State |
5-0-1 |
| 1976 |
Montana State |
6-0 |
| 1977 |
Boise State |
6-0 |
| 1978 |
Northern Arizona |
6-0 |
| 1979 |
Montana State |
6-1 |
| 1980 |
Boise State |
6-1 |
| 1981 |
Idaho State |
6-1 |
| 1982 |
Idaho, Montana, Montana State |
5-2 |
| 1983 |
Neavda |
6-1 |
| 1984 |
Montana State |
6-1 |
| 1985 |
Idaho |
6-1 |
| 1986 |
Nevada |
7-0 |
| 1987 |
Idaho |
7-1 |
| 1988 |
Idaho |
7-1 |
| 1989 |
Idaho |
8-0 |
| 1990 |
Nevada |
7-1 |
| 1991 |
Nevada |
8-0 |
| 1992 |
Idaho |
6-1 |
| 1993 |
Montana |
7-0 |
| 1994 |
Boise State |
6-1 |
| 1995 |
Montana |
6-1 |
| 1996 |
Montana |
8-0 |
| 1997 |
Eastern Washington |
7-1 |
| 1998 |
Montana |
6-2 |
| 1999 |
Montana |
7-1 |
| 2000 |
Montana |
8-0 |
| 2001 |
Montana |
7-0 |
| 2002 |
Montana State, Montana, Idaho State |
5-2 |
| 2003 |
Montana State, Montana, Northern Arizona |
5-2 |
| 2004 |
Montana, Eastern Washington |
6-1 |
| 2005 |
Eastern Washington, Montana State, Montana |
5-2 |
| 2006 |
Montana |
8-0 |
| 2007 |
Montana |
8-0 |
| 2008 |
Montana & Weber State |
7-1 |
| 2009 |
Montana |
8-0 |
| 2010 |
Eastern Washington & Montana State |
7-1 |
| 2011 |
Montana State |
7-1 |
| 2012 |
Eastern Washington, Montana State, Cal Poly |
7-1 |
| 2013 |
Eastern Washington |
8-0 |
| 2014 |
Eastern Washington |
7-1 |
| 2015 |
Southern Utah |
7-1 |
| 2016 |
Eastern Washington, North Dakota |
8-0 |
| 2017 |
Southern Utah, Weber State |
7-1 |
| 2018 |
Weber State, Eastern Washington, UC Davis |
7-1 |
| 2019 |
Weber State, Sacramento State |
7-1 |
| Spring 2021* |
Weber State |
5-1 |
| 2021 |
Sacramento State |
8-0 |
| 2022 |
Montana State, Sacramento State |
8-0 |
| 2023 |
Montana |
7-1 |
| 2024 |
Montana State |
8-0 |
| 2025 |
Montana State |
8-0 |
* - Season Held During Spring Due to COVID-19 Concerns