KMXA (1090 kHz) is a commercial AM radio station licensed to Aurora, Colorado, and serving the Denver metropolitan area.

Because AM 1090 is a clear channel frequency, reserved for Class A stations KAAY in Little Rock, WBAL in Baltimore and XEPRS in Tijuana, KMXA must reduce power at night to 500 watts to avoid interference.

In 1987, KLSC became KYBG (known as "KBIG"), the first all-sports radio station west of the Mississippi River, which was on air in the late 1980s and early 1990s.

"[4] On January 21, 2019, KMXA split from its simulcast with KJMN and switched to ESPN Deportes Radio Spanish sports.

[5] Over the weekend of August 31, 2019, the station dropped ESPN Deportes Radio ahead of the network's September 8 closure.