Sierra de Los Filabres is the largest mountain range in Almería Province. This remote area, frequently over 2.000m height, is the most isolated part of the route with more than 100km without villages or resupplies.

This mountain range was a historic crossroads of cultures, and its legacy includes remains of Roman aqueducts or Arab castles.

At the highest point of the range lies the iconic Calar Alto Observatory (2.168m), easy recognizable from many parts of the route.

The range also includes one of the most iconic and spectacular mountain pass in the Iberian Peninsula, el Puerto de Velefique (1.820m), popular by the high number of hairpin in the South side.

The South limit of Sierra de los Filabres reaches the village of Gérgal, considered the North gate of the Tabernas Desert.