Monte Perdido
Monte Perdido (center) and Cilindro de Marboré (left)
Highest point
Elevation	3,355 m (11,007 ft)
Prominence	969 m (3,179 ft)
Coordinates	42°40′N 0°02′E / 42.667°N 0.033°E / 42.667; 0.033
Naming
English translation	Lost mountain
Language of name	Spanish
Geography
Monte Perdido Pyrenees
Location	Ordesa Valley, Huesca Province, Aragon, Spain
Parent range	Pyrenees
UNESCO World Heritage Site
Official name	Pyrénées - Mont Perdu
Type	Mixed
Criteria	iii, iv, v, vii, viii
Designated	1997 (21st session)
Reference no.	773
Region	Europe and North America
Extensions	1999

Monte Perdido (in Spanish; Mont Perdu in French; Mont Perdito in Aragonese; all three meaning lost mountain) is the third highest mountain in the Pyrenees. The summit of Monte Perdido (3355 m), located in Spain, lies hidden from France by the seemingly impenetrable peaks of the Cirques of Gavarnie and Estaubé. It stands in the north of Huesca province. The mountain forms part of the Monte Perdido Range and is located in the Ordesa y Monte Perdido National Park, in the western part of the Pyrenees, in the community of Aragon, Spain.

Monte Perdido Glacier, located on the north-facing slope of Monte Perdido, is the third-largest glacier in the Pyrenees. It is surrounded by vertical cliffs up to 800m in height.^[1] Similar to most European glaciers, the Monte Perdido Glacier has been shrinking since the Little Ice Age, and since 1981, the glacier has lost 48 hectares of surface area.^[1] The rate of retreat is continuing to accelerate due to the effects of global climate change.

Access to the mountain is easier from Spain than from France. The route starts near the village of Torla, Aragon, at the Ordesa Valley and ascends the Cirque de Soaso towards the Refuge of Góriz before the stiff climb to the summit. It is a dangerous climb with snow.

Monte Perdido is the centrepiece of the Spanish Ordesa y Monte Perdido National Park which was established in 1918 with just 21 square kilometres/hectares of land. In the 1970s work began to build a dam in the nearby Añisclo Canyon with the objective of creating hydroelectric energy but institutions and citizens demonstrated against this and succeeded in stopping it. In 1982 the park was expanded significantly to 156 square kilometres/hectares and now incorporates the whole of the Añisclo Canyon.^[2] There are more than 1,500 species of flowers, 171 species of birds, 32 different mammals and 8 types of reptile in the Ordesa. Among these is the lammergeier (bearded vulture) with a 3-metre wingspan. The Pyrenees is one of the few places in Europe where these birds can be seen.

Because of its imposing landforms, the national park was inscribed on the UNESCO World Heritage List in 1997 as part of the Pyrénées – Mont Perdu World Heritage Site.^[3]

• List of mountains in Aragon
• List of Pyrenean three-thousanders

• (in Spanish) Normal route and Escaleras route to climb Monte Perdido komandokroketa.org, retrieved 2013-08-20
• (in English) "Glaciar de Monte Perdido - Gavarnie and Monte Perdido Massif" swisseduc.ch, retrieved 2013-08-20