August 1, 1968 Signed on as KBBK-FM. Power was 29,000 watts. Studios and transmitter were located at 9400 Fairview Avenue along with sister station KATN.
January 1974 Transmitter was moved to Deer Point, power was increased to 48,000 watts. Coverage increased from barely covering Boise to covering the entire Treasure Valley.
November 1, 1984 Call sign changed to KIYS
May 14, 1990 Call sign changed to KIZN