Cwm Dû, Gwynedd

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

• Category: Geographic Feature
• Type: Valley

• Latitude/Longitude: 53°2'15"N 4°9'39"W
• Eastings/Northings: 255208, 351106
• OS Grid: SH552511
• Mapcode Local: GBR 5N.DPQC
• Mapcode Global: WH550.1XW5

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