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Pioneer League

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The Pioneer League has been operating since 1939, first as Class C circuit from 1939 until 1942 and then again from 1946 through 1962. The league was Class A in 1964 and since 1964 has been at the "Rookie" class level.


Pioneer (C 1939-42, 1946-62)(A 1963)(Rookie 1964+)




Billings, MT: 1948-63, 1969+


Boise, ID: 1939-42, 1946-63


Butte, MT: 1978-65, 1987-2000


Caldwell, ID: 1967-71


Calgary, Alb: 1977-84


Casper, WY: 2001-2011


"Pocatello ID - Gate City": 1990


Great Falls, MT: 1948-63, 1969+


Helena, MT: 1978-2000

Idaho Falls, ID: 1940-42, 1946+


Lethbridge, Alb: 1975-83, 1992-98


Lewiston, ID: 1939


Twin Falls "Magic Valley": 1952-58, 1961-66, 1968-70


Medicine Hat, Alb: 1977-2003


Missoula, MT: 1956-60, 1999+

Ogden, UT: 1939-42, 1946-55, 1966-74, 1994+

Orem. UT: 2005+

Pocatello, ID: 1939-42, 1946-65, 1984-85, 1987-89, 1991, 1993

Provo, UT: 2001-04

Salt Lake City, ID: 1939-42, 1946-57, 1967-69, 1985-92

"Twin Falls Id-Treasure Valley": 1964-66

Twin Falls, ID: 1939-42, 1946-51, 1971

Grand Junction Co 2012-Present

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