레알타드

Founded in 1916 by a group of young people at the Worker's Athenaeum, Lealtad played in regional leagues until 1990, when it was promoted for the first time to Tercera División. In 1998, with Marcelino García as coach, the club achieved its first promotion ever to Segunda División B after defeating Real Madrid "C", Betanzos CF and Gimnástica Segoviana in the promotion playoffs.

It only remained in the third tier one season and spent fifteen more seasons in Tercera before being promoted again in 2014, after overcoming a critical economic situation in 2012, by beating CD Puertollano in the shootout of the group champions' play-off.

This time, Lealtad avoided relegation after beating Racing Ferrol in the last match of the 2014–15 season by 1–0. In the 2015–16 season, Lealtad achieved a great year with a 10th position, the best ever in the club's history.

After four seasons in the third tier, Lealtad would be relegated to Tercera División in April 2018, after receiving an 8–0 defeat from Bilbao Athletic.

On 24 October 2018, Lealtad achieved their first Asturian Copa Federación by defeating Sporting de Gijón B after a penalty shootout. The team finished the 2018–19 league season without losses in the Group 2, but failed to promote to Segunda División B after failing to beat firstly Getafe B and later Villarrobledo.