- Category: Water Feature
- Type: Wetland
- Latitude/Longitude: 52°27'5"N 4°4'44"W
- Eastings/Northings: 258824, 285742
- OS Grid: SN588857
- Mapcode Local: GBR 8S.LLCG
- Mapcode Global: VH4F5.8N03
Location and coordinates are for the approximate centre of Sarn Gynfelyn within this administrative area.
Geographic features and populated places may cross administrative borders.