Cerro del León is a stratovolcano located in El Loa province, Antofagasta Region, Chile.

Cerro del León itself was constructed in three stages by andesitic–dacitic lava flows and was subject to glacial erosion.

[2] The volcano is part of the San Pedro-Linzor lineament, a 65 kilometres (40 mi) long volcanic chain that extends northwest-southeastward.

The base of the volcano is constructed from andesitic lava flows that directly overlie the ignimbrite basement.

[2] Lavas contain phenocrysts of plagioclase with variable amounts of biotite, clinopyroxene, opaque minerals, and orthopyroxene.