Its legacy on FM radio dates back to 1961, when it signed on as KOL-FM. The frequency has seen both Progressive Rock (1968-1975) and Beautiful Music (1975-1978 as KEUT) formats, before flipping to its current format on February 1, 1978.
KMPS started its life as a country station in 1975, as KMPS AM 1300. It was a direct challenger to then-dominant country station KAYO 1150 AM. Today, it is one of two Country outlets targeting the Puget Sound region; KKWF is the other.