 The two newest members, Colorado and Utah, had a football rivalry that had been dormant since 1962 – both were conference rivals previously in the Rocky Mountain Athletic Conference (now a Division II conference), and later the now-defunct Mountain States Conference (also known as the Skyline Conference).Even after Colorado joined what became the Big 12 in 1948 (the conference was then known popularly as the Big 7 Conference), the two schools continued their football rivalry for over a decade before ending it after the 1962 season.With the two schools being placed in the same division for football starting in 2011, the rivalry was revived with their 58th meeting during the 2011 season.