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Matěj Čadil - Aros.jpg
"Aros" by Matěj Čadil
General Information
LocationFlowing from Himlad around Doriath to the Sirion
DescriptionReddish-coloured river
GalleryImages of Aros

Aros was a river of East Beleriand that formed much of the border of the Kingdom of Doriath.

It arose in the northern lands west of the Pass of Aglon in the Shadowy Spring, and flowed south between Dor Dínen and Himlad; between these two lands the river could be crossed at Arossiach. The river's course then followed the eastern and, turning west, the southern boundaries of the Forest of Region; at that point it was joined by its main tributary, Celon. Aros then met the Sirion at Aelin-uial.[1]

[edit] Etymology

The word Aros, derived from the Elvish root YAR- ("blood"), is said to be a "name of river with reddish water". The Noldorin form of the word was iaros.[2]


  1. J.R.R. Tolkien, Christopher Tolkien (ed.), The Silmarillion, "Map of Beleriand and the Lands to the North"
  2. J.R.R. Tolkien, Christopher Tolkien (ed.), The Lost Road and Other Writings, Part Three: "The Etymologies", p. 400