Ringwil

Ringwil was a river of the Beleriand during the First Age; a tributary of the Narog.

It flowed through Taur-en-Faroth from its beginning in the hills surrounding the hidden city of Nargothrond running approximately twenty-five miles in length. At the place it met the Narog, there was built a secret door that Lúthien used to escape the city when Celegorm and Curufin imprisoned her.