Cwm Silyn, Gwynedd

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

• Category: Geographic Feature
• Type: Valley

• Latitude/Longitude: 53°2'3"N 4°13'7"W
• Eastings/Northings: 251323, 350854
• OS Grid: SH513508
• Mapcode Local: GBR 5L.DTZ6
• Mapcode Global: WH54Z.5ZBQ

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