The major mountain ranges are the Sierra de Guadarrama, which runs approximately along the border of the Madrid and Castile and León autonomous communities, the Sierra de Gredos north of the border between Castile and León and Castile-La Mancha stretching into Extremadura and containing the range's highest mountain, Pico Almanzor, at 2,592 m, as well as the Serra da Estrela, containing the highest point in continental Portugal, A Torre, 1.993 m.
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Guadalajara is a mountainous place, the eastern side of the province is in the Sistema Ibérico area, while the Sistema Central rises in the western part.