| Glaslyn | |
|---|---|
 Looking east from Snowdon: Glaslyn at bottom, Llyn Llydaw above | |
  Glaslyn | |
| Location | Snowdon, Wales |
| Coordinates | 53°4′14″N 4°3′58″W / 53.07056°N 4.06611°W |
| Basin countries | United Kingdom |
| Max. length | 500 m (1,600 ft) |
| Max. width | 300 m (980 ft) |
| Surface area | 0.1 km2 (0.039 sq mi) |
| Max. depth | 39 m (128 ft) |
| Surface elevation | 600 m (2,000 ft) |
Glaslyn (Welsh for 'Blue lake') is a lake in the Snowdonia National Park in Gwynedd, north-west Wales.