- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°26'36"N 3°36'22"W
- Eastings/Northings: 290930, 284047
- OS Grid: SN909840
- Mapcode Local: GBR 9D.M2T1
- Mapcode Global: VH5BW.FVY5
Location and coordinates are for the approximate centre of Cwm Heulog within this administrative area.
Geographic features and populated places may cross administrative borders.