Enduro singletrack route that allows us to link, from R2,R15, T16 and A22, with the area of Collada Verde/Peña del Asno and Puente de Alba. We descend along a technical but fun singletrack towards the Arroyo de Alcedo. Once at the stream, we take a trail that climbs towards the ruins of the abandoned mining facilities of La Tensora and from there towards Collada Verde, where two more stretches of descent on a natural trail await us, joined by a short linking forest road take us to the vicinity of Puente de Alba. Once in Puente de Alba we will find the R2 and R15 signposts that will take us back to any point in Zona Alfa that we wish to go to.