Places in Middle-earth
Type: Rivers & Lakes
Region: Beleriand & North
Dorthonion rose southward into mountainous moors; and in the east of those highlands there lay a lake, Tarn Aeluin, with wild heaths about it, and all that land was pathless and untamed, for even in the days of the Long Peace none had dwelt there. But the waters of Tarn Aeluin were held in reverence, for they were clear and blue by day and by night were a mirror for the stars; and it was said that Melian herself had hallowed that water in the days of old. Thither Barahir and his outlaws withdrew, and there made their lair, and Morgoth could not discover it.
The Silmarillion, Quenta Silmarillion, Ch 19, Of Beren and Lúthien
[The] carrion-birds rose from the ground and sat in the alder-trees beside Tarn Aeluin....
Elena Tiriel 13Nov10, 14Mar10