Pen Twyn Mawr

Pen Twyn Mawr - Powys
© James Ayres and licensed for reuse under this Licence

Pen Twyn Mawr is the 2937th highest peak in the British Isles and the 154th tallest in Wales


658.0 m (2159 ft)


17.0 m (56 ft)

Survey method

Abney level


No feature 15m NE of cairn


Hill / mountain range

Black Mountains

Nearest town

Hay-on-Wye/Y Gelli Gandryll, Powys

OS map sheets

OS25: 013N (Brecon Beacons National Park)
OS50: 161 (Abergavenny & The Black Mountains/Y Mynyddoedd Duon)