Founded in the 1970s, it is the reserve team of CD Calahorra, and currently plays in Tercera Federación – Group 16, holding home matches at Estadio La Planilla, with a capacity of 5,000 spectators.

Founded in 1965 as CD Calahorra Promesas, the club acted as a reserve team of CD Calahorra and played intermittently in the regional leagues until the club decided to close the reserve section in 1995.

[2][3][4] They returned to an active status in 1998, playing four seasons in the Regional Preferente before again folding.

[6][7] In the following year, however, the club opted to use the Juvenil squad as their reserve team, and the B-team became inactive.

Calahorra B returned to action in 2018, and immediately achieved promotion to Tercera División in May of the following year.