The Berwyn range (Welsh: Y Berwyn or Mynydd y Berwyn) is an isolated and sparsely-populated area of moorland located in the north-east of Wales, roughly bounded by Llangollen in the north-east, Corwen in the north-west, Bala in the south-west, and Oswestry in the south-east. It is famously known for its alleged 1974 UFO crash known as the Berwyn Mountain UFO incident.
The best walk in the Berwyns is Cadair Berwyn (2723 m/ft 830 m).
To the south of Bala is the Aran mountain range with 14 summits above 2000 ft (600 m). The Aran ridge covers the principal summits including Aran Fawddwy (2969 ft/905 m) and Aran Benllyn (2904 ft/885 m).
To the west of Bala is the Arenig mountain range with 13 summits above 2000 ft (600 m). Arenig Fawr (854 m) is the principal summit.
Snowdonia has been renowned for walking since Victorian times, hence the famous photo of crinolined women on the summit of Snowdon. Since then the main mountains of Snowdonia have been well trodden.