Llynnau Mymbyr
Encyclopedia
Llynnau Mymbyr are two lakes located in Dyffryn Mymbyr
Dyffryn Mymbyr
Dyffryn Mymbyr is a valley in Snowdonia, North Wales, approximately in length, and leading up from Capel Curig to the Pen-y-Gwryd hotel....

, a valley running from the village of Capel Curig
Capel Curig
Capel Curig is a village and community in Conwy County Borough, in Wales. It lies in the heart of Snowdonia, on the River Llugwy, and has a population of 226...

 to the Pen-y-Gwryd
Pen-y-Gwryd
Pen-y-Gwryd is a pass at the head of Nantygwryd and Nant Cynnyd rivers in Gwynedd, North Wales and a quarter of a mile from the boundary with Conwy in northern Snowdonia, close to the foot of Snowdon...

 hotel in Snowdonia
Snowdonia
Snowdonia is a region in north 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:...

, north-west Wales
Wales
Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...

. The A4086 runs along their northern banks.

Strictly speaking this is one lake, originally called Llyn Mymbyr, with a maximum depth of 30 feet. About 3/4 mile long in total, a delta has built up midway along the north shore, and this has to all purposes cut the lake in two - hence the plural name.

The river feeding the lakes is the Nantygwryd (or Nant-y-gwryd), which has its source at Llyn Cwm-y-ffynnon
Llyn Cwm-y-ffynnon
Llyn Cwm-y-ffynnon is a lake in Snowdonia, below the summit of Moel Berfedd in Cwmffynnon. The lake's original name was Fynnon Mymbyr as outlined in Llywelyn ap Iorwerth's charter of 1198. As the name suggests the lake nestles in a short valley, a cwm, high above the Pen-y-Gwryd hotel...

, also marked on maps as the Nant Gwryd, which is a tributary of the Afon Llugwy. The two rivers join at Capel Curig.

The lake was used for fly-fishing and sub-aqua courses in the 1960s and is still used today as a canoe training resource by Plas y Brenin
Plas y Brenin
Plas y Brenin, is currently the The National Mountain Centre for Wales . The Centre is situated in Dyffryn Mymbyr, the Mymbyr Valley, in Snowdonia and is less than a quarter of a mile south-west of the centre of Capel Curig on the A4086 road....

 and other Local Education Authorities.

Geographical and Geological Context

The lakes lie in a depression formed by a ring of sandstone
Sandstone
Sandstone is a sedimentary rock composed mainly of sand-sized minerals or rock grains.Most sandstone is composed of quartz and/or feldspar because these are the most common minerals in the Earth's crust. Like sand, sandstone may be any colour, but the most common colours are tan, brown, yellow,...

 called the Capel Curig Volcanic Formation which can be vaguely seen in the panorama below which was taken from the north side. The igneous rocks of Moel Siabod
Moel Siabod
Moel Siabod is a mountain in Snowdonia, North Wales, which sits isolated above the villages of Betws-y-Coed and Capel Curig. At 872m it is the highest peak in the Moelwynion mountain range. The UK National Mountain Centre, Plas-y-Brenin, is located at the foot of Moel Siabod...

 can be seen behind the lakes which are linear but in the panorama appear to bend at the delta between the two.

External links

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