Depart from Navacerrada towards Valsain crossing Puerto de la Fuenfria in the Guadarrama National Park. The port of Fuenfría is a mountain pass that crosses Sierra de Guadarrama with an altitude of 1796m. It joins the Spanish provinces of Segovia and Madrid between Sierra de la Mujer Muerta in the west and Siete Picos in the east. (See more)