The Iberian System is one of the major systems of mountain ranges in Spain.It consists of a vast and complex area of mostly relatively high and rugged mountain chains and massifs located in the central region of the Iberian Peninsula, but reaching almost the Mediterranean coast in the Valencian Community in the east.
The system is hydrographically important, as it separates the watersheds of most of the major rivers in Spain and Portugal, including the Ebro basin to the east from the basins of the Douro, Tagus, Guadiana (Záncara-Gigüela), Júcar and Turia to the west and south.