KJJM (100.5 FM, "The Rock") is a radio station licensed to serve Baker, Montana.

The station shares studios with sister KFLN, at 3584 Highway 7, north of Baker, Montana.

The station has listeners in the surrounding area including Glendive, Wibaux, Bowman, Plevna, and Ekalaka.

With the launch of the station, several former DJs appeared using alternate names inspired by "Scooby-Doo" including "Daphne Blake", "Freddy Jones", and "Shaggy Rogers" as well as another male, and previous co-host of the morning show, referred to as "The Most Hated Man in Baker".

The station occasionally airs play-by-play of local high school sports.