Foel Cwm-Sian Llwyd, Gwynedd

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

• Category: Geographic Feature
• Type: Hill or Mountain

• Latitude/Longitude: 52°52'17"N 3°29'40"W
• Eastings/Northings: 299500, 331500
• OS Grid: SH995315
• Mapcode Local: GBR 6J.R3MF
• Mapcode Global: WH67F.925X

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