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Topography

Catalonia has a marked geographical diversity, considering the relatively small size of its territory. The geography is conditioned by the Mediterranean coast, with 580 kilometres (360 miles) of coastline, and the towering Pyrenees along the long northern border. Catalonia is divided into three main geomorphological units:

The Catalan Pyrenees represent almost half in length of the Pyrenees, as it extends more than 200 kilometres (120 miles). Traditionally differentiated the Axial Pyrenees (the main part) and the Pre-Pyrenees (southern from the Axial) which are mountainous formations parallel to the main mountain ranges but with lower altitudes, less steep and a different geological formation. The highest mountain of Catalonia, located north of the comarca of Pallars Sobirà is the Pica d'Estats (3,143 m), followed by the Puigpedrós (2,914 m). The Serra del Cadí comprises the highest peaks in the Pre-Pyrenees and forms the southern boundary of the Cerdanya valley.

The Central Catalan Depression is a plain located between the Pyrenees and Pre-Coastal Mountains. Elevation ranges from 200 to 600 metres (660 to 1,970 feet). The plains and the water that descend from the Pyrenees have made it fertile territory for agriculture and numerous irrigation canals have been built. Another major plain is the Empordà, located in the northeast.

The Catalan Mediterranean system is based on two ranges running roughly parallel to the coast (southwest–northeast), called the Coastal and the Pre-Coastal Ranges. The Coastal Range is both the shorter and the lower of the two, while the Pre-Coastal is greater in both length and elevation. Areas within the Pre-Coastal Range include Montserrat, Montseny and the Ports de Tortosa-Beseit. Lowlands alternate with the Coastal and Pre-Coastal Ranges. The Coastal Lowland is located to the East of the Coastal Range between it and the coast, while the Pre-Coastal Lowlands are located inland, between the Coastal and Pre-Coastal Ranges, and includes the Vallès and Penedès plains.