Llyn Dwr-oer, Gwynedd

• Built-Up Area: Blaenau Ffestiniog
• Parish/Community: Ffestiniog
• Unitary Authority: Gwynedd
• Region: Wales

• Category: Water Feature
• Type: Inland Water

• Latitude/Longitude: 52°59'29"N 3°54'49"W
• Eastings/Northings: 271649, 345496
• OS Grid: SH716454
• Mapcode Local: GBR 5Z.HHT6
• Mapcode Global: WH55H.V2JK

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