Carn Fadryn, sometimes Carn Fadrun or Garn Fadryn, is a five-hectare Iron Age hillfort and is the name of the mountain on which the fort is situated. It lies in the centre of the Llŷn Peninsula, Gwynedd, and overlooks the village of Garnfadryn, Wales.
- Elevation: 371 m
- Prominence: 343 m
- Listing: Marilyn
- Parent peak: Yr Eifl
More details: https://en.wikipedia.org/wiki/Carn_Fadryn