Ascent to the mountain pass of Linera is a challenge. Awaits us several hills with slopes exceeding 20%, rewarded when you reach the pass by the magnificent views of the Sierra Norte de Madrid and Segovia. The routes continue along the Horizontal trail to Cerro de Santuil and descends to the ancient railway station, where it takes the M-991 road to return to Villavieja through Las Cabezas housing state.