Pen Allt-mawr

Pen Allt-mawr - Blaenau Gwent
© Jonathan Billinger and licensed for reuse under this Licence

Pen Allt-mawr is the 2146th highest peak in the British Isles and the 87th tallest in Wales


720.0 m (2362 ft)


102.0 m (335 ft)

Survey method

Abney level


No feature 30m S of trig point


Hill / mountain range

Black Mountains

Nearest town

Nantyglo, Blaenau Gwent

OS map sheets

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

Notes & comments

Ground higher than base of trig point at SO 20691 24334, but ground within 10m of trig point could also be as high