Guadarrama (river)

Guadarrama
Río Guadarrama. Community of Madrid, Spain
Path of the Guadarrama
Location
CountrySpain
RegionCommunity of Madrid
Castilla-La Mancha
Province of Toledo
Physical characteristics
Source 
 • locationSiete Picos (Sierra de Guadarrama)
 • elevation1,900 m (6,200 ft)
Mouth 
 • location
Tagus
 • elevation
500 m (1,600 ft)
Length131.80 km (81.90 mi)
Basin size1,708 km2 (659 sq mi)
Basin features
ProgressionTagusAtlantic Ocean
Tributaries 
 • leftAulencia

The Guadarrama is a river in Spain. A tributary of the Tagus, the longest river on the Iberian Peninsula, Guadarrama has its source in the Siete Picos, part of the Sierra de Guadarrama, in the Community of Madrid, in the central part of the country, at an altitude of 1,900 metres (6,200 ft).