Arenig Fach

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Arenig Fach
Moorland above Llyn Arenig Fach 779212.jpg
The north-eastern face of Arenig Fach
Highest point
Elevation 689 m (2,260 ft)
Prominence 294 m (965 ft)
Parent peak Arenig Fawr
Listing Marilyn, Hewitt, Nuttall
Translation Small High Ground (Welsh)
Pronunciation Welsh: [aˈrɛnɪɡ ˈvax]
Location Gwynedd, Wales
Parent range Snowdonia
OS grid SH827370
Topo map OS Landranger 124

Arenig Fach is a mountain in southern Snowdonia, north Wales. It is a peak in the Arenig range and lies to the north of its parent peak Arenig Fawr.

It lies close to Llyn Celyn alongside the A4212 between Trawsfynydd and Bala. Carnedd y Filiast and Foel Goch (Arenigs) is to the east, while Moel Llyfnant, Gallt y Daren and Arenig Fawr are to the south.

The summit itself is known as Carnedd Bachgen, named after the ancient cairn, Carnedd y Bachgen (which lies just north-east of the summit), and is the highest point at the north end of a wide plateau. There is a trig point and a substantial shelter cairn. The mountain rises from the Migneint moorland and looks like a bulky heathery "lump" from most directions. However, its north-eastern face has steep cliffs with a small corrie lake, Llyn Arenig Fach, at their bottom.[1] The last glacier occupation of this corrie is thought to have happened during the Loch Lomond Stadial.[2]

Arenig Fach summit area with Carnedd Bachgen (right)


  1. ^ Nuttall, John & Anne (1999). The Mountains of England & Wales - Volume 1: Wales (2nd edition ed.). Milnthorpe, Cumbria: Cicerone. ISBN 1-85284-304-7.
  2. ^ Loch Lomond Stadial glaciers in the Aran and Arenig Mountains, North Wales, Great Britain. Philip D. Hughes. Geological Journal, Volume 37 Issue 1, Pages 9 - 15. 2001.

Coordinates: 52°57′30″N 3°45′25″W / 52.95833°N 3.75694°W / 52.95833; -3.75694