Aneto is the highest
mountain in the
Pyrenees and in
Aragon, and
Spain's third-highest mountain, reaching a height of . It lies in the
Spanish province of
Huesca, the northernmost of all three Aragonese provinces. It forms the southernmost part of the
Maladeta massif. It is also known as
Pic de Néthou in
French, though this is little used as the mountain lies entirely within Spain.