- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 53°6'35"N 4°6'32"W
- Eastings/Northings: 258917, 359035
- OS Grid: SH589590
- Mapcode Local: GBR 5Q.849B
- Mapcode Global: WH54T.V3F9
Location and coordinates are for the approximate centre of Cwm Aelhir within this administrative area.
Geographic features and populated places may cross administrative borders.