River Narog

It rose from the Pools of Ivrin in the Ered Wethrin[?], flowed south and then southeast, flowing through a gorge in a series of rapids where it crossed the hills of the Andram or Long Wall, finally meeting Sirion in the Land of Willows Nan-tathren[?], not far above the Mouths of Sirion. Narog's tributaries were the River Ginglith in the north and the River Ringwil in the Taur-en-Faroth.

Into its western bank, just south of where Ringwil rushed into Narog, was carved the city of Nargothrond, stronghold of Finrod Felagund.