- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 53°5'18"N 4°1'28"W
- Eastings/Northings: 264500, 356500
- OS Grid: SH645565
- Mapcode Local: GBR 5V.9DTK
- Mapcode Global: WH54W.4MRN
Location and coordinates are for the approximate centre of Llyn Cwmffynnon within this administrative area.
Geographic features and populated places may cross administrative borders.