The station began life at 99.3 FM as KOSN in Thief River Falls, Minnesota in 1976. KOSN broadcast only 3,000 watts. The station changed call letters to KSNR in 1983 as it flipped to an oldies format, concentrating on 50s and 60s "Golden Oldies" format. After upgrading to 100,000 watts at 100.3 FM in 1987, the station attracted listeners in Grand Forks, North Dakota, since the signal could be heard on most radios and KSNR was the only oldies station in the area.
In the fall of 2012, all local personalities were removed from Cat Country in favor of Bobby Bones Show in the morning and Premium Choice radio personalities in all other dayparts. The previous local morning show was moved to sister station KQHT (96.1 The Fox), which carries an updated classic hits version of the former "Kool 100.3" oldies format.