The Pyrenees ( /ˈpɪərɨniːz/; Spanish: Pirineos or Pirineo, French: Pyrénées, Catalan: Pirineus, Occitan: Pirenèus, Aragonese: Perinés, Basque: Pirinioak or Auñamendiak), also spelled Pyrénées, is a range of mountains in southwest Europe that forms a natural border between France and Spain. It separates the Iberian Peninsula from the rest of continental Europe, and extends for about 491 km (305 mi) from the Bay of Biscay (Cap Higuer) to the Mediterranean (Cap de Creus).

For the most part, the main crest forms a massive divider between France and Spain, with the tiny country of Andorra sandwiched in between. Catalonia and Navarre have historically extended on both sides of the mountain range, with small northern portions now in France and much larger southern parts now in Spain.

The adjective related to the noun "Pyrenees" in English is Pyrenean.

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