kuez went on the air in 1984. the station became kmso, an adult contemporary/adult alternative hybrid, in 1987. kmso moved to a mainstream ac format in 1997, but it tended at times to be more gold-based especially during the day. with the nearest pop station only providing rimshot coverage and sometimes in conflict with another ac station in kalispell, kmso would lean more adult top 40 at night. the station backed off that lean when a new chr station, kxdr, signed on in 1999, completing its move back to ac with the addition of delilah on valentine's day 2000. the station would have the ac market to itself until 2001, when kltc signed on. when kltc became a successful adult top 40 as "wild 107.5" in 2003, mountain fm moved to its present hot ac format.