| YEAR |
CHAMPION |
RUNNER-UP |
FINALS |
| 1939 |
Twin Falls Cowboys |
|
|
| 1940 |
Ogden Reds |
|
|
| 1941 |
Ogden Reds |
|
|
| 1942 |
Pocatello Cardinals |
|
|
| 1946 |
Salt Lake City Bees |
|
|
| 1947 |
Twin Falls Cowboys |
|
|
| 1948 |
Twin Falls Cowboys |
|
|
| 1949 |
Pocatello Cardinals |
|
|
| 1950 |
Billings Mustangs |
|
|
| 1951 |
Great Falls Electrics |
|
|
| 1952 |
Idaho Falls Russets |
|
|
| 1953 |
Salt Lake City Bees |
|
|
| 1954 |
Great Falls Electrics |
|
|
| 1955 |
Magic Valley Cowboys |
|
|
| 1956 |
Boise Braves |
|
|
| 1957 |
Billings Mustangs |
|
|
| 1958 |
Boise Braves |
|
|
| 1959 |
Billings Mustangs |
|
|
| 1960 |
Boise Braves |
|
|
| 1961 |
Great Falls Electrics |
|
|
| 1962 |
Billings Mustangs |
|
|
| 1963 |
Idaho Falls Yankees |
|
|
| 1964 |
Treasure Valley Cubs |
|
|
| 1965 |
Treasure Valley Cubs |
|
|
| 1966 |
Ogden Dodgers |
|
|
| 1967 |
Ogden Dodgers |
|
|
| 1968 |
Ogden Dodgers |
|
|
| 1969 |
Ogden Dodgers |
|
|
| 1970 |
Idaho Falls Angels |
|
|
| 1971 |
Great Falls Giants |
|
|
| 1972 |
Billings Mustangs |
|
|
| 1973 |
Billings Mustangs |
|
|
| 1974 |
Idaho Falls Angels |
|
|
| 1975 |
Great Falls Giants |
|
|
| 1976 |
Great Falls Giants |
|
|
| 1977 |
Lethbridge Dodgers |
|
|
| 1978 |
Billings Mustangs |
Idaho Falls Angels |
2-0 |
| 1979 |
Lethbridge Dodgers |
Helena Brewers |
2-0 |
| 1980 |
Lethbridge Dodgers |
Billings Mustangs |
2-1 |
| 1981 |
Butte Copper Kings |
Calgary Expos |
3-2 |
| 1982 |
Medicine Hat Blue Jays |
Idaho Falls A's |
3-1 |
| 1983 |
Billings Mustangs |
Calgary Expos |
3-1 |
| 1984 |
Helena Gold Sox |
Billings Mustangs |
3-1 |
| 1985 |
Salt Lake City Trappers |
Great Falls Dodgers |
3-2 |
| 1986 |
Salt Lake City Trappers |
Great Falls Dodgers |
3-1 |
| 1987 |
Salt Lake City Trappers |
Helena Brewers |
3-1 |
| 1988 |
Great Falls Dodgers |
Butte Copper Kings |
3-2 |
| 1989 |
Great Falls Dodgers |
Butte Copper Kings |
3-0 |
| 1990 |
Great Falls Dodgers |
Salt Lake City Trappers |
3-0 |
| 1991 |
Salt Lake City Trappers |
Great Falls Dodgers |
2-1 |
| 1992 |
Billings Mustangs |
Salt Lake City Trappers |
2-0 |
| 1993 |
Billings Mustangs |
Helena Brewers |
2-1 |
| 1994 |
Billings Mustangs |
Helena Brewers |
3-2 |
| 1995 |
Helena Brewers |
Medicine Hat Blue Jays |
2-0 |
| 1996 |
Helena Brewers |
Ogden Raptors |
2-0 |
| 1997 |
Billings Mustangs |
Great Falls Dodgers |
2-0 |
| 1998 |
Idaho Falls Braves |
Lethbridge Mounties |
2-1 |
| 1999 |
Missoula Osprey |
Billings Mustangs |
2-0 |
| 2000 |
Idaho Falls Padres |
Great Falls Dodgers |
2-0 |
| 2001 |
Billings Mustangs |
Provo Angels |
2-0 |
| 2002 |
Great Falls Dodgers |
Provo Angels |
2-1 |
| 2003 |
Billings Mustangs |
Provo Angels |
2-0 |
| 2004 |
Provo Angels |
Billings Mustangs |
2-0 |
| 2005 |
Orem Owlz |
Helena Brewers |
2-0 |
| 2006 |
Missoula Osprey |
Idaho Falls Chukars |
2-0 |
| 2007 |
Orem Owlz |
Great Falls White Sox |
2-0 |
| 2008 |
Great Falls Voyagers |
Orem Owlz |
2-1 |
| 2009 |
Orem Owlz |
Missoula Osprey |
2-1 |
| 2010 |
Helena Brewers |
Ogden Raptors |
2-0 |
| 2011 |
Great Falls Voyagers |
Ogden Raptors |
2-0 |
| 2012 |
Missoula Osprey |
Ogden Raptors |
2-1 |
| 2013 |
Idaho Falls Chukars |
Helena Brewers |
2-1 |
| 2014 |
Billings Mustangs |
Orem Owlz |
2-0 |
| 2015 |
Missoula Osprey |
Idaho Falls Chukars |
2-1 |
| 2016 |
Orem Owlz |
Billings Mustangs |
2-0 |
| 2017 |
Ogden Raptors |
Great Falls Voyagers |
2-1 |
| 2018 |
Great Falls Voyagers |
Grand Junction Rockies |
2-0 |
