Pumlumon, meaning ‘Five Peaks’, is a ridge of peaks in the Cambrian Mountains, the highest of which is Pen Pumlumon Fawr at 752m. Although it’s not the highest of Wales’ mountains, many people consider it the jewel in Wales’ crown. That’s because, on a clear day at the summit, the whole of Wales unfolds before the eyes. To the west, Snowdonia links to Preseli via the sweep of Cardigan Bay and, to the east, the Berwyn and Aran ranges connect to the Brecon Beacons along the English border. Pumlumon is also the source of the River Severn, Britain’s longest river, as well as the Rheidiol.