Glaslyn (Snowdon)

Situated at a height of approximately 1970 feet above sea level, Glaslyn is a very deep oligotrophic lake east of Snowdon summit alongside the Miner's Track from Pen-y-Pass. The water is usually crystal clear - and very cold, but on a hot day it's a good place to cool off if you've trekked up this far. The shore is mostly of small stones, and there's very little algal growth on the bottom. A 'beach' area is alongside the path on the north side and the water deepens quickly. The water from the lake cascades down into Llyn Llydaw.