- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 53°16'2"N 3°44'31"W
- Eastings/Northings: 283917, 375890
- OS Grid: SH839758
- Mapcode Local: GBR 2Z9N.NG
- Mapcode Global: WH65C.H49K
Location and coordinates are for the approximate centre of Nant Bryn-y-Maen within this administrative area.
Geographic features and populated places may cross administrative borders.