Pen y Fan Pen y Fan Pen y Fan () is the highest peak in south Wales, situated in the Brecon Beacons National Park. At above sea-level, it is also the highest British peak south of Cadair Idris in Snowdonia. The twin summits of Pen y Fan and Corn Du at 873 m (2,864 ft) were formerly referred to as Cadair Arthur or 'Arthur's Seat'. The mountain and surrounding area are owned by the National Trust whose work parties attempt to combat the erosion caused by the passage of thousands of feet up and down this most popular of South Wales' peaks. The
Pen-y-ghent summit. The more direct route that traverses the southern 'nose' of the hill is the route usually taken by those attempting the Yorkshire Three Peaks Challenge, as the walk is usually (but not exclusively) done in an anti-clockwise direction starting and finishing in Horton in Ribblesdale. The other main hillwalking route on the hill heads north from the summit to reach Plover Hill before descending to join Foxup Road, a bridleway at the head of Littondale. Pen-y-ghent is one of the mountains on the Yorkshire Three Peaks route. Pen-y-Ghent is made up of a millstone grit top sat upon a