Llyn y Mynydd-du, Flintshire

• Parish/Community: Treuddyn
• Unitary Authority: Flintshire
• Region: Wales

• Category: Water Feature
• Type: Inland Water

• Latitude/Longitude: 53°6'30"N 3°10'16"W
• Eastings/Northings: 321692, 357462
• OS Grid: SJ216574
• Mapcode Local: GBR 6Y.845C
• Mapcode Global: WH77K.8446

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