The Calgary Stampeders are a professional football team based in Calgary, Alberta, competing in the West Division of the Canadian Football League. The Stampeders play their home games at McMahon Stadium and are the third-oldest active franchise in the CFL. The Stampeders were officially founded in 1935 as the Calgary Bronks, although there were clubs in Calgary as early as 1909. The Stampeders have won 18 Western Division Championships and one Northern Division Championship. They have appeared in 13 Grey Cup Championship games, and have won the league's Grey Cup championship six times; most recently in 2008. The team has a provincial rivalry with the Edmonton Eskimos, as well as fierce divisional rivalries with the Saskatchewan Roughriders and the BC Lions.