These determined the Western Canadian representative in the 1975 Allan Cup Final.
Champions[]
Semi-Final[]
Best of 5
| Game | Visitors | Goals | Home Team | Goals | Date | Venue |
| 1 | Thunder Bay Twins |
6 | St. Boniface Mohawks |
3 | Tuesday, April 15, 1975 | Winnipeg Arena |
| 2 | Thunder Bay Twins |
3 | St. Boniface Mohawks |
5 | Wednesday, April 16, 1975 | Winnipeg Arena |
| 3 | Thunder Bay Twins |
5 | St. Boniface Mohawks |
3 | Friday, April 18, 1975 | Winnipeg Arena |
| 4 | St. Boniface Mohawks |
2 | Thunder Bay Twins |
5 | Saturday, March 19, 1975 | Thunder Bay Gardens |
| Thunder Bay Twins defeated St. Boniface Mohawks 3-games-to-1 | ||||||
Final (Patton Cup)[]
Best of 5
| Game | Visitors | Goals | Home Team | Goals | Date | Venue |
| 1 | Spokane Flyers | 2 | Thunder Bay Twins | 7 | Friday, April 25, 1975 | Thunder Bay Gardens |
| 2 | Spokane Flyers | 1 | Thunder Bay Twins | 6 | Saturday, April 26, 1975 | Thunder Bay Gardens |
| 3 | Spokane Flyers | 4 | Thunder Bay Twins | 5 | Sunday, April 27, 1975 | Thunder Bay Gardens |
| Thunder Bay Twins defeated Spokane Flyers 3-games-to-none | ||||||
Thunder Bay Twins advanced to the 1975 Allan Cup Final.