In the spring, the Thistles and Thunder Bay traditionally met in a best-of-3 series to determine the Ontario Hockey Association champion for the Renwick Cup.

In the 2007 playoffs, the Thunder Bay Bombers defaulted due to lack of money despite winning the Allan Cup in 2005 and traveling Europe in 2006 to play against professional European clubs.

With no Northern Ontario competition, the Kenora earned the right to compete in the Renwick Cup and as well to host it.

But, the Thistles did not book ice time in time and the Town of Kenora would not alter their schedule, so Hockey Canada stripped Kenora of hosting rights and awarded them to the eventual OHA champion, who ended up being the Whitby Dunlops of the Eastern Ontario Senior Hockey League.

These games included a pair against Theoren Fleury's Steinbach North Stars, hosts of the 2009 Allan Cup.

Due to the same protest that changed the result of their game against the Thunderhawks, the Thistles met the Twins again in the tournament final.

The Thistles were to host the 2017 Allan Cup in Kenora; however the tournament was moved after the hockey club ceased operations on January 10, 2016.

With the demise of the Thistles, Northwestern Ontario has no senior hockey clubs left competing for the Renwick Cup.