- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°51'7"N 3°3'37"W
- Eastings/Northings: 327054, 217603
- OS Grid: SO270176
- Mapcode Local: GBR F3.TKGV
- Mapcode Global: VH78Z.WPXZ
Location and coordinates are for the approximate centre of Cwm Trosnant within this administrative area.
Geographic features and populated places may cross administrative borders.