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Sierra Oeste de Madrid
The Sierra Oeste de Madrid is the most western part of the Sierra de Madrid - collective name for the various mountain ranges in the province of Madrid - and is adjacent to the Sierra de Guadarrama, which is also part of the Sierra de Madrid. As such the mountain range is part of the Central System (Sistema Central). It is a transitional mountains range between the Sierra de Madrid and the Sierra de Gredos.
The principal towns are San Martín de Valdeiglesias, Robledo de Chavela, Valdemaqueda and Cenicientos.
The Sierra Oeste de Madrid is the least known part of the Sierra de Madrid, except for the reservoir of San Juan which, because of the fact that it is the only reservoir in the province of Madrid in which swimming is allowed, can be overcrowded with visitors from the capital. Because in this part of the Sierra de Madrid the mountains are considerably lower than in the Sierra de Guadarrama and the Sierra Norte de Madrid, the hikes are much more accessible for a big audience and can they also be perfectly done in winter.