Bwlch y Ddwyallt

Bwlch y Ddwyallt is a sandstone summit in Brecon Beacons that rises to 754 meters and forms the highest point of the Gwaun Cerrig Llwydion plateau in the eastern section of the national park. The plateau connects to several neighboring peaks and is partly crossed by the Beacons Way.

The cliffs beneath this summit show geological evidence from ice age periods, revealing how glaciers shaped the current landscape. The sandstone layers date from the Devonian period and sit above the older Brownstones Formation.

The Welsh name refers to a mountain pass rather than a peak, showing how locals traditionally named geographical features in this region. This naming choice reflects how people here understood and described the terrain.

Several walking paths connect this summit to neighboring mountains, offering routes of varying difficulty levels. Visitors should be prepared for changing weather and wear sturdy footwear.

The sandstone formations display a clear geological boundary between two different rock layers, which is of particular interest to geologists. This transition between formations is visible at the surface and makes the summit notable for scientific study.

Location: Powys

Elevation above the sea: 754 m

GPS coordinates: 51.87390,-3.37370

Latest update: December 14, 2025 18:20