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Llyn Llydaw seen from the summit of Snowdon
|Location||Snowdonia National Park, Wales|
|Lake type||natural, reservoir|
|Basin countries||United Kingdom|
|Surface area||110 acres (45 ha)|
|Surface elevation||436 m (1,430 ft)|
Llyn Llydaw (from the Welsh meaning Brittany lake) is a natural lake in Snowdonia National Park on the flanks of Snowdon, Wales' highest mountain. This long thin lake has formed in a cwm about one-third of the way up the mountain.
The lake featured in Robson Green's Wild Swimming Adventure (ITV December 2009), chosen because it is allegedly the coldest lake in Britain. Green's website states that the water was 7 degrees Celsius, but other Welsh lakes are often colder than this.
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