Pen y Boncyn Trefeilw

About Pen y Boncyn Trefeilw

Rising from the wild, peat-covered plateau of the Berwyns, this Hewitt offers a quieter alternative to the busier main ridge. Characterised by rolling heather and tricky peat hags, it provides a sense of deep isolation. It is a place for the navigator, rewarding the trek across the moor with expansive, untamed views.

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Did You Know?

• •The name is Welsh for 'the top of the hillock of Trefeilw'; Trefeilw was an ancient township within the parish of Llanarmon Dyffryn Ceiriog, indicating the hill's historical role as communal grazing land.
• •Though classified as a Hewitt and a Nuttall, the summit is relatively featureless, making the small pile of stones marking the high point a vital navigational fix when the Berwyn mists descend.
• •The summit offers a clear, unobstructed perspective of the steep eastern crags of Cadair Berwyn and Moel Sych, while looking west reveals the distinctively lumpy profiles of the Arenig hills.
• •Reaching this point usually involves a boggy traverse from the main Berwyn ridge, requiring hikers to negotiate 'hags'—deep trenches in the peat that can be several feet deep.
• •It is the kind of summit where the vertical depth of the surrounding peat hags often feels more significant than the actual climb from the col.