Arenig Fach is a

mountain A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited summit area, and is usually highe ...

in southern

Snowdonia Snowdonia or Eryri (), is a mountainous region in northwestern Wales and a national park of in area. It was the first to be designated of the three national parks in Wales, in 1951. Name and extent It was a commonly held belief that the na ...

, north

Wales Wales ( cy, Cymru ) is a country that is part of the United Kingdom. It is bordered by England to the east, the Irish Sea to the north and west, the Celtic Sea to the south west and the Bristol Channel to the south. It had a population in ...

. It is a peak in the Arenig range and lies to the north of its parent peak

Arenig Fawr Arenig Fawr ( en, Great High Ground) is a mountain in Snowdonia, North Wales, close to Llyn Celyn reservoir, alongside the A4212 between Trawsfynydd and Bala. Location Arenig Fawr is the highest member of the Arenig range, with Arenig Fach ...

. It lies close to Llyn Celyn alongside the A4212 between

Trawsfynydd Trawsfynydd (; Welsh for "across hemountain") is a linear village in Gwynedd, Wales, near Llyn Trawsfynydd reservoir, and adjacent to the A470 north of Bronaber and Dolgellau and 10 km (6 miles) south of Blaenau Ffestiniog. The total com ...

and Bala. Carnedd y Filiast and Foel Goch (Arenigs) is to the east, while

Moel Llyfnant Moel Llyfnant is a mountain in the southern portion of the Snowdonia National Park in Gwynedd, Wales. It is a peak in the Arenig mountain range. It lies to the west of Arenig Fawr. It has one notable top, the twin peaked Gallt y Daren, being ...

, Gallt y Daren and

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 A triangulation station, also known as a trigonometrical point, and sometimes informally as a trig, is a fixed surveying station, used in geodetic surveying and other surveying projects in its vicinity. The nomenclature varies regionally: they a ...

and a substantial shelter cairn. The mountain rises from the

Migneint The Migneint () is a large expanse of moorland in central Snowdonia, north-west Wales. It is part of the ''Migneint-Arenig-Dduallt'' Special Area of Conservation, along with the mountains Arenig Fawr, Arenig Fach and Dduallt, covering a range of ...

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. The last glacier occupation of this corrie is thought to have happened during the Loch Lomond Stadial.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.

References

Marilyns of Wales Hewitts of Wales Nuttalls Mountains and hills of Snowdonia Mountains and hills of Gwynedd Llanycil {{Gwynedd-geo-stub