Cefn Gwyntog is a top of Cyrniau Nod in north east Wales.

It forms a part of the Berwyn range known as the Hirnantau.

The views from the summit are extensive, if unremarkable due to the featureless, flat moorland surroundings.

The summit is marked by a small cairn surrounded by peat bog and knee deep heather.

Cefn Gwyntog is renowned as one of the hardest summits in Wales to reach, due to its remoteness and hard walking terrain.