Llyn Elsi is a

lake A lake is an area filled with water, localized in a basin, surrounded by land, and distinct from any river or other outlet that serves to feed or drain the lake. Lakes lie on land and are not part of the ocean, although, like the much large ...

located above the village of

Betws-y-coed Betws-y-coed (; '' en, prayer house in the wood'') is a village and community in the Conwy valley in Conwy County Borough, Wales, located in the historic county of Caernarfonshire, right on the boundary with Denbighshire, in the Gwydir Forest. ...

in the

Snowdonia National Park 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 nam ...

North Wales , area_land_km2 = 6,172 , postal_code_type = Postcode , postal_code = LL, CH, SY , image_map1 = Wales North Wales locator map.svg , map_caption1 = Six principal areas of Wales common ...

. It is a

reservoir A reservoir (; from French ''réservoir'' ) is an enlarged lake behind a dam. Such a dam may be either artificial, built to store fresh water or it may be a natural formation. Reservoirs can be created in a number of ways, including contro ...

providing water for the village. There is a path round the lake, and affords good views to the north-west towards the mountain ranges of the

Carneddau The (lit. 'the cairns'; is a Welsh plural form, and is sometimes anglicised to ''Carnedds'') are a group of mountains in Snowdonia, Wales. They include the largest contiguous areas of high ground (over or high) in Wales and England (although l ...

and the

Glyderau The Glyderau (a Welsh plural form, also known in English as the Glyders) are a mountain group in Snowdonia, North Wales. The name derives from the highest peaks in the range, Glyder Fawr and Glyder Fach. According to Sir Ifor Williams, the word ...

Snowdon Snowdon () or (), is the highest mountain in Wales, at an elevation of above sea level, and the highest point in the British Isles outside the Scottish Highlands. It is located in Snowdonia National Park (') in Gwynedd (historic ...

itself is not visible behind

Moel Siabod Moel Siabod ( Welsh for "bare hill" with unknown meaning of 'Siabod'), is a mountain in Snowdonia, North Wales, which sits isolated above the village of Dolwyddelan. At , it is the highest peak in the Moelwynion mountain range. The UK National Mo ...

. The lake is more than 700 ft above sea level, and has a small island. The 20 ft dam was built in 1914, but even so the lake only has a maximum depth of approximately 9 metres. Prior to this the lake was two smaller lakes, called Llyn Rhisgog and Llyn Enoc. A memorial at the northern end of the lake commemorates the fact that Lord Ancaster permitted the building of the dam and the use of the lake as a water supply. In 1946

black-headed gull The black-headed gull (''Chroicocephalus ridibundus'') is a small gull that breeds in much of the Palearctic including Europe and also in coastal eastern Canada. Most of the population is migratory and winters further south, but some birds res ...

s established a colony at the lake, causing concern over pollution to the water supply. The lake is kept stocked with various type of

trout Trout are species of freshwater fish belonging to the genera '' Oncorhynchus'', ''Salmo'' and ''Salvelinus'', all of the subfamily Salmoninae of the family Salmonidae. The word ''trout'' is also used as part of the name of some non-salmoni ...

by the local angling club. Llyn Elsi can be reached on foot by various paths, one starting behind St. Mary's church in the village.

References

{{authority control Betws-y-Coed

Elsi The Human Genome Project (HGP) was an international scientific research project with the goal of determining the base pairs that make up human DNA, and of identifying, gene mapping, mapping and DNA sequencing, sequencing all of the genes of the ...