Pen Allt-mawr

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Pen Allt-mawr
Pen Allt-mawr from Pen Cerrig-calch
Highest point
Elevation 720 m (2,360 ft)
Prominence 102 m (335 ft)
Parent peak Waun Fach
Listing Hewitt, Nuttall, HuMP
Coordinates 51°54′42″N 3°09′16″W / 51.9118°N 3.1544°W / 51.9118; -3.1544Coordinates: 51°54′42″N 3°09′16″W / 51.9118°N 3.1544°W / 51.9118; -3.1544
Translation top of the big slope (Welsh)
Location Black Mountains, South Wales
OS grid SO206243
Topo map OS Landranger 161
Listed summits of Pen Allt-mawr
Name Grid ref Height Status
Pen Twyn Glas SN969193 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.

It summit is stony and has a large shelter cairn. Its top Pen Twyn Glas is to the north, while its close neighbour Pen Cerrig-calch is to the south.[1]


  1. ^ Nuttall, John & Anne (1999). The Mountains of England & Wales - Volume 1: Wales (2nd edition ed.). Milnthorpe, Cumbria: Cicerone. ISBN 1-85284-304-7.

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