Aneto is the highest mountain in the Pyrenees and in Aragon, and Spain's third-highest mountain, reaching a height of 3,404 metres. It stands in the Spanish province of Huesca, the northernmost of the three Aragonese provinces, 6 kilometres south of the France–Spain border. It forms the southernmost part of the Maladeta massif.

The Pyrenees are a mountain range straddling the border of France and Spain. They extend nearly 500 km (310 mi) from their union with the Cantabrian Mountains to Cap de Creus on the Mediterranean coast, reaching a maximum altitude of 3,404 metres (11,168 ft) at the peak of Aneto.