The Rivil was a lesser tributary of the River Sirion. Its source was Rivil's Well in the highlands of Dorthonion, from which it flowed westward to meet the Sirion at the Fen of Serech.
Description
The Rivil was a lesser tributary of the River Sirion . Its source was Rivil's Well in the highlands of Dorthonion , from which it flowed westward to meet the Sirion at the Fen of Serech .
In F.A. 472, before the Nirnaeth Arnoediad, the army that Morgoth sent to draw out Fingon was staged above the Sirion, from the inflowing of Rivil to the walls of Eithel Sirion to the north.
In the latter stages of the Nirnaeth Arnoediad, King Turgon retreated down the Pass of Sirion. His escape was successful because Húrin and Huor formed a rearguard that used the Rivil as a defence. The host of Angband bridged the stream with the corpses of their dead. Huor was slain beside the Rivil and Húrin was captured.