Destroyed at the end of the
First Age
At the western end of
Dorthonion, surrounding and concealing the city of
Gondolin
Gondolin stood on the plain of
Tumladen within the Echoriath; the mine of
Anghabar was within the mountains themselves
At one time a lake had formed within the mountains, and a river had flowed southwestward out of the lake, but during historical times both lake and river were dry, and the surviving riverbed is known only as the
Dry River
The peaks in the southern part of the range were known as the
Crissaegrim