This is the 1979-80 Central Amateur Senior Hockey League season.
- Brandon Olympics & Transcona Chargers withdrew.
- League Expands, accepting the Warroad Lakers.
- League schedules 85 games, 32 per team, included 10 games with Thunder Bay Twins.
- Manitoba Amateur Hockey Association announced that League playoffs would be for the Pattison Cup.
|St. Boniface Mohawks||32||19||13||0||38|
|East Kildonan-Elmwood Millionaires||32||18||14||0||36|
|St. James Flyers||32||7||25||0||14|
|Thunder Bay Twins||10||9||1||0||-|
Note: The Lakers were the only CASHL team to beat the Twins.
- Semi Finals
- Pattison Cup Championship
Western Canadian ChampionshipEdit
- Allan Cup Playoffs
|MVP||Gerard McDonald||St. Boniface Mohawks|
|Top Goaltending (GAA)||?????|