description Cwm Glaslyn Overview
Cwm Glaslyn is a glacial cirque on Snowdon (Yr Wyddfa), the highest mountain in Wales at 1,085 m. The cirque contains Llyn Glaslyn, a deep lake situated below the summit pyramid. The Pyg Track and Miner's Track are popular hiking routes that pass near the lake on the ascent to the summit. Snowdon is located within Snowdonia National Park in North Wales.
help Cwm Glaslyn FAQ
Which Snowdon paths pass Cwm Glaslyn?
The Miners' Track passes Llyn Glaslyn before climbing steeply toward the summit route. The Pyg Track runs higher along the side of the cwm and overlooks both Glaslyn and Llyn Llydaw.
How was Cwm Glaslyn formed?
Glacial ice excavated the rock basin beneath Snowdon, leaving a steep-walled cirque after the ice retreated. It forms part of a descending series of glacial basins that also includes Cwm Llydaw and Cwm Dyli.
Is Llyn Glaslyn directly below the summit of Snowdon?
Yes, the lake occupies the high cwm beneath the mountain's steep northeastern side. It lies at roughly 600 metres above sea level, well below Snowdon's 1,085-metre summit.
Why does Cwm Glaslyn have two different Welsh names in guidebooks?
Cwm Glaslyn refers to the glacial hollow, while Glaslyn or Llyn Glaslyn names the lake inside it. In Welsh, llyn means lake and cwm refers to a steep-sided valley or cirque.
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