The Nalón is the longest river in the autonomous community of Asturias, Spain, measuring 153-kilometre (95 mi). It joins the Cantabrian Sea in San Esteban de Pravia. Its tributaries include the Narcea River.

The Nalón River

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43°34′03″N 6°04′39″W / 43.5674°N 6.07748°W / 43.5674; -6.07748