The Parc National des Pyrénées was created in 1967 to protect at least part of the high Pyrenees from modern touristic development – ski resorts, paved roads, mountaintop restaurants, car parks and other inappropriate amenities. It extends for more than 100km along the Spanish border from Pic de Laraille (2147m), south of Lescun, in the west, to beyond Pic de la Munia (3133m), almost to the Aragnouet–Bielsa tunnel. Varying in altitude between 1070m and 3298m at the Pic de Vignemale, south of Cauterets, the park includes the spectacular Gavarnie and Troumouse cirques, as well as 220 lakes, more than a dozen valleys and about 400km of marked walking routes.
By the banning of hunting and all dogs and vehicles (except local herders), the park has also provided sanctuary for many rare, endangered species of birds and mammals. These include chamois, marmots, stoats, genets, griffon vultures, golden eagles, eagle owls and capercaillies, to say nothing of the rich and varied flora. The most celebrated animal – extinct as of 2004 – is the Pyrenean brown bear, whose pre-1940 numbers ran to as many as two hundred; the twenty plus current specimens are descended from introduced Slovenian brown bears. Although largely herbivorous, bears will take livestock opportunistically, and most mountain shepherds are their remorseless enemies. To appease the shepherds, local authorities pay prompt and generous compensation for any losses, but the restocking programme remains highly controversial, with pro- and anti-bear graffiti prominent on the road approaches to the park, and troublesome animals being shot illegally by aggrieved farmers or herders on a regular basis.
The GR10 runs through the entire park on its 700-kilometre journey from coast to coast, starting at Banyuls-sur-Mer on the Mediterranean and ending at Hendaye-Plage on the Atlantic.