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Aran Fawddwy
Aran Fawddwy.jpg
Aran Fawddwy (on left) and Creiglyn Dyfi
Highest point
Elevation 905 m (2,969 ft)
Prominence 670 m (2,200 ft)
Parent peak Snowdon
Listing Marilyn, Hewitt, Nuttall
English translation Mawddwy peak
Language of name Welsh
English approximation: ARR-ən-VOWDH-wee
Location Gwynedd, UK
Parent range Snowdonia
OS grid SH862223
Topo map OS Landranger 124, 125
Listed summits of Aran Fawddwy
Name Grid ref Height Status
Aran Benllyn SH866243 885 m (2,904 ft) H, N
Erw y Ddafad-ddu SH864234 872 m (2,861 ft) H, N
Foel Hafod-fynydd SH876227 689 m (2,260 ft) H, N
Gwaun y Llwyni SH857204 685 m (2,247 ft) H, N
Gwaun Lydan SH880211 632 m (2,073 ft) N
Waun Camddwr SH862223 621 m (2,037 ft) N
Pen yr Allt Uchaf SH867192 620 m (2,030 ft) H, N

Aran Fawddwy is a mountain in southern Snowdonia, Wales, United Kingdom. It is the highest point (county top) of the historic county of Merionethshire (for local government purposes, it lies within the current council area of Gwynedd). It is the only peak in Wales outside North Snowdonia above 900m, and higher than anywhere in Great Britain outside Northern Snowdonia, the Scottish Highlands (and islands) and the Lake District. The nearest urban centres to the mountain are Dinas Mawddwy to the south, Llanymawddwy to the southeast, Llanuwchllyn on the shores of Bala Lake to the north, and Rhydymain to the west. The nearest settlements with around 2,000 people are Bala and Dolgellau. On the eastern slopes of Aran Fawddwy is the small lake named Creiglyn Dyfi, the source of the River Dyfi. Its sister peak is Aran Benllyn at 885 metres (2,904 ft). There is also a middle peak- Erw y Ddafad-ddu.

A cairn is placed on the eastern ridge as a memorial to RAF Mountain Rescue team member Michael Robert Aspain who was struck and killed by lightning in 1960.


Aran Fawddwy is best ascended from Cywarch in the south, although a longer ridge climb is possible from the Bala side. The mountain forms a long rocky ridge with Aran Fawddwy as the highest point, but Aran Benllyn as another notable summit. The eastern side is extremely steep, falling spectacularly in crags to a series of glacial cwms or corries which also enclose two small lakes (Creiglyn Dyfi and Llyn Lliwbran). The western slopes are also rocky, but less steep and more uniform. The view from the summit is extensive covering most of the mountain ranges of North Wales and as far south as the Brecon Beacons and Pembrokeshire peninsula. On an exceptionally clear day, the Lake District in England and Wicklow Mountains in Ireland are visible.


Aran Fawddwy, which is only 9.5 metres (31 ft) short of being a member of the Welsh 3000s, is the highest peak in the Aran mountain range and the 16th highest summit in Wales. The other two Marilyns in this range are Glasgwm and Esgeiriau Gwynion.

It is the highest British mountain south of Snowdon and is the principal summit of the predominant southwest–northeast ridge between Dolgellau and Bala, southern Snowdonia, a ridge that continues westwards as Cadair Idris.

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