Mwdwl-eithin

Mwdwl-eithin () is the highest point on the Denbigh Moors (

Welsh Welsh may refer to: Related to Wales * Welsh, of or about Wales * Welsh language, spoken in Wales * Welsh people, an ethnic group native to Wales Places * Welsh, Arkansas, U.S. * Welsh, Louisiana, U.S. * Welsh, Ohio, U.S. * Welsh Basin, during t ...

: Mynydd Hiraethog) of

North Wales North Wales ( ) is a Regions of Wales, region of Wales, encompassing its northernmost areas. It borders mid Wales to the south, England to the east, and the Irish Sea to the north and west. The area is highly mountainous and rural, with Snowdon ...

. This gently rising mountain lies about east of

Betws-y-Coed Betws-y-Coed () is a village and community (Wales), community in Conwy County Borough, Wales. The village is located near the confluence of the River Conwy and the River Llugwy and is on the eastern edge of Snowdonia. The population of the co ...

. On its summit 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 station is usually set up by a map ...

and a ruined building which still provides shelter against a storm. A few metres away is a large raised stone

cairn A cairn is a human-made pile (or stack) of stones raised for a purpose, usually as a marker or as a burial mound. The word ''cairn'' comes from the (plural ). Cairns have been and are used for a broad variety of purposes. In prehistory, t ...

. The whole area is underlain by

Silurian The Silurian ( ) is a geologic period and system spanning 23.5 million years from the end of the Ordovician Period, at million years ago ( Mya), to the beginning of the Devonian Period, Mya. The Silurian is the third and shortest period of t ...

mudstone Mudstone, a type of mudrock, is a fine-grained sedimentary rock whose original constituents were clays or muds. Mudstone is distinguished from ''shale'' by its lack of fissility.Blatt, H., and R.J. Tracy, 1996, ''Petrology.'' New York, New York, ...

which was extensively glaciated during the last British glaciation. The whole area is now very wet moorland dominated by heather (''

Calluna ''Calluna vulgaris'', common heather, ling, or simply heather, is the sole species in the genus ''Calluna'' in the flowering plant family Ericaceae. It is a low-growing evergreen shrub growing to tall, or rarely to and taller, and is found wide ...

'' and ''

Erica Erica or ERICA may refer to: * Erica (given name) * Erica (plant), ''Erica'' (plant), a flowering plant genus * Erica (chatbot), a service of Bank of America * Erica (video game), ''Erica'' (video game), a 2019 FMV video game * Erica (spider), ' ...

'' spp.) and rushes. Three of the surrounding valleys and depressions have been used for drinking water storage reservoirs, Llyn Alwen,

Llyn Aled Llyn Aled is a lake on Mynydd Hiraethog in the Conwy County Borough. It is situated north of the A543 and to the north-east of the village of Pentrefoelas. It is a natural lake; however, a dam was built at its northern outlet to increase its si ...

and Alwen Reservoir. Mountains and hills of Conwy County Borough Marilyns of Wales {{Conwy-geo-stub