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The Aros River was a river that ran through Beleriand in Middle-earth during the First Age.

The Aros River was a tributary of the river Sirion. It rose in and flowed from the northern lands around Himring. It then met the Siron at Aelin-uial. The Aros formed the eastern and southern borders of the Kingdom of Doriath and joined the Sirion at the Kingdom's southwest corner.[1]

Real Life

Aros is also the original name of Aarhus, the second largest city in Denmark.


Foreign Language Translated name
Danish Arosfloden
Chinese (Hong Kong) 阿羅斯河

Rivers of Beleriand

Adurant | Aros | Ascar | Brilthor | Brithon | Celebros | Celon | Dry River | Duilwen | Esgalduin | Gelion | Ginglith | Glithui | Greater Gelion | Legolin | Little Gelion | Malduin | Mindeb | Narog | Nenning | Ringwil | Sirion | Taeglin


  1. The Silmarillion (inside cover), "Map of Beleriand and the Lands to the North"