Pen Allt-mawr from Pen Cerrig-calch
|Elevation||720 m (2,360 ft)|
|Prominence||102 m (335 ft)|
|Parent peak||Waun Fach|
|Listing||Hewitt, Nuttall, HuMP|
|Translation||top of the big slope (Welsh)|
|Location||Black Mountains, South Wales|
|Topo map||OS Landranger 161|
|Listed summits of Pen Allt-mawr|
|Pen Twyn Glas||646 metres (2,119 ft)||sub Hewitt, Nuttall|
Pen Allt-mawr is subsidiary summit of Waun Fach and the third highest peak in the Black Mountains in south-eastern Wales. It lies near the end of the westernmost of Waun Fach's south ridges. It is a very recognisable and prominent peak of the Black Mountains.
- Nuttall, John & Anne (1999). The Mountains of England & Wales - Volume 1: Wales (2nd edition ed.). Milnthorpe, Cumbria: Cicerone. ISBN 1-85284-304-7.