Corn Du Travel Guide

Corn Du is the prominent second highest peak in South Wales, reaching 871.5 meters (2,864 feet). It forms the twin summit alongside Pen y Fan, which is slightly higher at 886 meters, both dominating the skyline of the Brecon Beacons National Park. Situated approximately 550 meters southwest of Pen y Fan, Corn Du’s summit is marked by a well-preserved Bronze Age cairn with a central burial cist, echoing ancient human presence and cultural significance in the region.

The summit’s flat, anvil-shaped plateau is composed of erosion-resistant Devonian sandstones known as the Plateau Beds, which create dramatic escarpments visible from afar. This geology is shared with nearby peaks and contributes to the rugged, scenic landscape. Near Corn Du lies Llyn Cwm Llwch, one of the few natural glacial lakes in the park, formed during the last ice age. The surrounding moorlands and valleys, including the Usk valley and Cwm Llwch, offer diverse habitats and striking natural beauty.

From Corn Du, visitors can enjoy sweeping views across south and mid-Wales, including the Black Mountain range to the west, the Cambrian Mountains, and on clear days, as far as the Severn Estuary and South-West England. The steep northern slopes contrast with gentler southern descents toward the South Wales valleys. The landscape is wild and open, providing a sense of remoteness and connection with nature.

Corn Du is a key part of popular hiking circuits in the Brecon Beacons, often combined with Pen y Fan. Well-maintained footpaths lead from access points such as the Pont ar Daf car park, making the summit accessible for experienced walkers. The terrain includes peat bogs and moorland, so preparation for changing weather is essential. The area is dog-friendly and offers opportunities for strenuous walks, nature observation, and photography.

The Bronze Age cairn atop Corn Du signifies its long-standing cultural importance. Nearby, Tommy Jones’ Obelisk memorializes a poignant local story, adding a human narrative to the natural setting. The surrounding woodlands contain semi-ancient trees and diverse birdlife, contributing to the ecological richness and heritage of the region.

As part of the Brecon Beacons National Park and a Site of Special Scientific Interest, Corn Du benefits from conservation efforts to protect its unique geology, wildlife, and landscapes. Visitors are encouraged to respect the environment, stay on marked paths, and enjoy the tranquil yet exhilarating mountain experience that Corn Du offers year-round, weather permitting.