Time: Two hours.
Leaving Vadillo town to La Nava de San Pedro, about 1 km. farther, there is a track to the right which leads to source of the river Guadalquivir.
After crossing La Sarga´s gorge and walking on for 3 km. we shall arrive at the historic bridge Las Herrerías, in an area of poplars along the river banks where there is a recreational area and a camping site.
Before crossing the bridge on the right and northwards we shall find the short but varied El Oso track, near the road which leads to the Parador Nacional del Adelantado.
The pine grove along our walking track is very old and beautiful.