Saturday, 1 July 2000

Moelwyn Mawr

Moelwyn Mawr over Cwm Croesor
Height: 770m (2,526ft)
Prominence: 385m (1,263ft)
Region: Snowdonia - The Moelwyns
Classifications: Nuttall, Hewitt, Marilyn
Summit feature: Trig pillar
Times climbed: 1
Related trip report
Cnicht & The Moelwyns - 18/09/2017

The trig pillar marks an extensive view
Moelwyn Mawr forms part of the Moelwynion. It has a high reservoir, Llyn Stwlan, which is part of the Ffestiniog Power Station pumped-storage hydroelectric power plant in Tanygrisiau.

In 1990, Moelwyn Mawr was designated a Site of Special Scientific Interest of national scientific importance. The glaciated landscape of the mountain provides fine examples of two specific Pleistocene features. On the north-east flank of the mountain is a terrain of patterned ground, consisting of small-scale vegetated stripes. On the west side, a debris tongue formed by a rock glacier extends into Cwm Croesor.

Moelwyn Mawr overlooks the Vale of Ffestiniog and affords spectacular views in all directions.