The Narcea is a river in Asturias. It is a tributary of the Nalón River, starting about 5 km east of the parish of Monasterio de Hermo and meeting the Nalón near the municipality of Pravia. The river spans 123 km and is the second longest in Asturias, following only the Nalón itself. The river is host to multiple salmon preserves, and is additionally inhabited by the endangered Cantabrian brown bear.