- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 53°4'57"N 3°59'55"W
- Eastings/Northings: 266220, 355813
- OS Grid: SH662558
- Mapcode Local: GBR 5W.9T97
- Mapcode Global: WH54W.KS13
Location and coordinates are for the approximate centre of Llyn Pen-y-Gwryd within this administrative area.
Geographic features and populated places may cross administrative borders.