- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 53°1'18"N 4°10'3"W
- Eastings/Northings: 254710, 349356
- OS Grid: SH547493
- Mapcode Local: GBR 5N.FN3R
- Mapcode Global: WH555.Y9MV
Location and coordinates are for the approximate centre of Cwm Trwsgl within this administrative area.
Geographic features and populated places may cross administrative borders.