- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°47'58"N 3°8'1"W
- Eastings/Northings: 321925, 211835
- OS Grid: SO219118
- Mapcode Local: GBR F0.XZ6N
- Mapcode Global: VH6CW.M1Q5
Location and coordinates are for the approximate centre of Cwm Llam-March within this administrative area.
Geographic features and populated places may cross administrative borders.