These events occured in 1905 in the world of hockey:
- Ottawa Hockey Club wins a challenge series against the Dawson City Nuggets of Dawson City, Yukon two games to nil. The Dawson club has travelled over 4,000 miles by dog sled, boat and train to play the Silver Seven but are outmatched. Frank McGee, incensed by comments from the Dawson squad, scores 14 goals as Ottawa wins the second game 23–2.
- Ottawa wins the Federal Amateur Hockey League (FAHL) championship to defend the Stanley Cup.
- Ottawa defeats Rat Portage Thistles 2 games to nil in a Stanley Cup challenge.
9 December — Eastern Canada Amateur Hockey Association (ECAHA) is formed from teams in the Canadian Amateur Hockey League (CAHL) and the FAHL. Stanley Cup champion Ottawa and Montreal Wanderers join from FAHL and Montreal, Montreal Shamrocks, Montreal Victorias and Quebec Bulldogs join from the CAHL.