Sierra de Baza and Sierra de los Filabres conform a large mountain range in the provinces of Granada and Almería. 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 route lies the iconic Calar Alto Observatory (2.168m), easy recognizable from many other parts of the area.
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.
In the south side of the mountain range are located the villages of Gérgal and Velefique, considered the north gates of the Tabernas Desert.