Yr Elen via Cwm Caseg Circular Route Overview This 12km route up Yr Elen via Cwm Caseg starts in Bethesda with a lovely walk up the valley heading towards the biggest of the Carneddau mountain range. You’ll spot the central summit of Yr Elen immediately as you start walking from Gerlan. However, once you have … Continue reading Yr Elen from Bethesda via the Dragons Teeth Ridge and Cwm Caseg