Pen y Castell is a summit in the Carneddau mountains in north Wales.
It tops the east ridge of Drum (Wales).
The summit consists of rocky outcrops amid a small boggy plateau.
Views of the higher Carneddau ridge to the west, Craig Eigiau to the south, Tal y Fan to the north and the Conwy valley to the east can be seen.
This Conwy County Borough location article is a stub.