Sierra de Los Filabres is the largest mountain range in Almería Province, Andalusia, Spain, measuring 50 km (31 mi) in length.

Its highest point, Calar Alto, also hosts an important astronomical observatory.

[1] The Sierra de Los Filabres belongs to the Penibaetic System and forms the southern limit of the Almanzora Valley.

Besides its highest point, the 2,168 m high Calar Alto, other important peaks are the Tetica de Bacares or "La Tetica" (2,086 m), a breast-shaped hill,[2] and the Calar Gallinero (2,049 m).

There are picturesque towns in this range, like Olula de Castro,[4] Chercos Viejo and Sierro, to name but a few.