666 m
Cyrniau Nod is a mountain summit in north east Wales. It is a former Marilyn, the Marilyn summit now being the nearby Foel Cedig. Its summit has the Snowdonia National Park boundary running through it. A number of rivers and streams rise from near the mountain including Afon Tanat, Afon Cedig and Nant Ystrad-y-Groes.