Corn Du

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Corn Du
Pen y Fan from the summit of Corn Du
Elevation 873 m (2,864 ft)
Prominence 28 m (92 ft)
Parent peak Pen y Fan
Listing Nuttall
Translation Black Horn (Welsh)
Location Powys, Wales
Range Brecon Beacons
OS grid SO012215
Topo map OS Landranger 160

Corn Du is a mountain immediately to the southwest of Pen y Fan and the second highest peak in South Wales, situated in the Brecon Beacons National Park. Tommy Jones' Obelisk is found on its western flanks, in between the summit and Y Gyrn.

The summit is very similar to that of Pen y Fan: flat and anvil shaped. It is similarly formed from the relatively erosion-resistant Devonian age sandstones from the Upper Old Red Sandstone known as the Plateau Beds. It is marked by a large cairn. The summit is often crossed on the way to Pen y Fan. It offers good views down into Cwm Llwch and across the Usk valley to Brecon.[1]

Nearby is one of the few natural lakes in the park, the diminutive Llyn Cwm Llwch.


  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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Coordinates: 51°53′00″N 3°26′13″W / 51.88328°N 3.43684°W / 51.88328; -3.43684