Okanagan Mainline Leauge was an Independent league and a Senior League that was based in British Columbia. 1945 Kamloops, Kelowna, Revelstoke, Salmon Arm 1951 Kamloops, Kelowna, Oliver, Penticton, Vernon 1952 Summerland enter the league. 1953 No Teams enter or left the league 1954 Princeton enter the League 1955 Princeton left the leagie 1956 No Teams enter or left the league 1957 Princeton enter the League 1967 Kamloops Kelowna, Penticton, Vernon 1968 unknown 1969 Kamloops Kelowna, Vernon 1970 Unknown