Ordesa y Monte Perdido National Park is an IUCN Category II National Park situated in the Pyrenees of Huesca province, Aragon, Spain. There has been a National Park in the Ordesa Valley since 1918. Its protected area was enlarged in 1982 to cover the whole region amounting to 156.08 km².
Many illustrious persons have been fond of the places in this region and have expounded their virtues. Luciano Briet, Soler i Santaló and Lucas Mallada helped promote the reputation of the region and obtain protected status for it.
An area of 21 square kilometres containing the Ordesa Valley was declared a National Park on 16 August 1918 by a Royal Decree. On 13 July 1982, it was enlarged to its current 156.08 km² and its official name was changed to Parque nacional de Ordesa y Monte Perdido.