Cwm y Derw

About Cwm y Derw

Rising to 510m in the rolling expanse of Central Wales, this summit embodies the quiet, pathless character of the Pumlumon range. The terrain is dominated by high moorland grass and peat, offering a genuine sense of isolation. It serves as an excellent vantage point for surveying the wild, undulating heart of the Cambrian Mountains.

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Did You Know?

• •The name is Welsh, translating to 'Valley of the Oaks.' Although the summit is now a treeless expanse of moorland grass, the name points to the ancient oak woods that once reached deeper into the cloughs of the Cambrian Mountains.
• •This hill is located within what is often termed the 'Green Desert of Wales,' one of the most remote and least-populated areas in the UK south of the Highlands, characterised by a complete absence of roads or villages.
• •To the north, the massive, sprawling profile of Pumlumon Fawr dominates the skyline, while looking south offers a perspective over the remote catchment area of the Claerwen Reservoir and the Elan Valley.
• •Navigating this area requires a philosophical attitude toward footwear, as the terrain consists mostly of 'Central Wales gold'—a polite local term for the saturated peat bogs that safeguard the summit.