Rambling in the Sierra de Guadarrama - Cotos to Navas de Cabeza de Hierro

The Puerto de Cotos is easily accessible from Navacerrada or from Rascafría, and there is ample parking space. The route is simple at the beginning, but becomes complicated after crossing the Arroyo de los Cerradillos. The path is almost invisible in the overgrown vegetation but is easily navigated as it's mostly low heather, rock rose (cistus) and Pyrenean broom (Cytisus oromediterraneus). Although the map doesn't show any path, there are animal trails through the vegetation but you will have to navigate over the terrain, using the track to keep you on the route. There are also a number of National Park signs that will guide you along the edge of the Guadarrama National Park. The descent follows a stream, the Arroyo de Hierro, to reach the forest track. From there, the walking is easy and returns along the rushing stream Arroyo de las Guarramillas, passing by the Socrates Pool.