On a clear day, Arenig Fawr offers views over nearby Bala to the Llangollen and Clwydian hills, as well as to the Rhinogydd, the Moelwynion and Yr Wyddfa.

Accessible via a number of routes, this isolated mountain is notable for being the site of a crash in August 1943 of a B-17 Flying Fortress. All eight US crew were killed. A memorial to them was erected on the summit in 1945, with the original replaced in 2019.

Many people starting a walk up Arenig Fawr will set off from the road next to Llyn Celyn. Few will probably know that the lake was made to provide water to Liverpool and that creating it involved flooding the Tryweryn valley and, with it, the village of Capel Celyn. With people forced to move out of the valley, ‘Cofiwch Dryweryn’ (Remember Tryweryn) has become a rallying cry for Welsh independence.