Pen Pumlumon Arwystli, Mountain summit in Ceredigion, Wales.
Pen Pumlumon Arwystli is a mountain summit in the Cambrian Mountains standing at 741 meters and ranking as the second highest peak in the Plynlimon massif. The terrain consists of rolling moorland with several well-marked footpaths ascending from different directions.
The summit served as a key navigation point in Welsh territory over many centuries due to its prominent position within the Cambrian range. Three substantial stone cairns at the peak mark the ancient use and importance of this location in the region's past.
The mountain's name merges Pumlumon, meaning five peaks in Welsh, with Arwystli, showing how the place is rooted in the local language and regional identity. Walking here, you notice this connection through bilingual signs and the way locals talk about the surrounding territory.
The best time to hike is from spring through autumn when the moorland paths are safest to walk on. The northern approach offers direct views toward the River Severn's source and serves as a helpful landmark while navigating the route.
The peak qualifies under both Hewitt and Nuttall mountain classifications, meeting specific height and topography criteria used by hillwalkers. Many visitors are unaware that this summit technically functions as the parent peak to the nearby Pen Pumlumon Fawr.
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