Llyn Dyrnogydd, Gwynedd

• Parish/Community: Ffestiniog
• Unitary Authority: Gwynedd
• Region: Wales

• Category: Water Feature
• Type: Inland Water

• Latitude/Longitude: 53°1'13"N 3°56'59"W
• Eastings/Northings: 269304, 348788
• OS Grid: SH693487
• Mapcode Local: GBR 5Y.FLZJ
• Mapcode Global: WH559.9BBV

Location and coordinates are for the approximate centre of Llyn Dyrnogydd within this administrative area. Geographic features and populated places may cross administrative borders.