 Montana was also a member of the Pacific Coast Conference until 1950, and a fellow charter member of the Big Sky in 1963.Idaho leads the overall series 55–27–2 (), but Montana has dominated the rivalry since 1991.The Idaho–Montana rivalry was renewed as a conference rivalry in non-football sports when Idaho rejoined the Big Sky in 2014, and the football version was renewed in 2018 upon Idaho's return to Big Sky football.