- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°38'49"N 3°31'40"W
- Eastings/Northings: 296730, 306580
- OS Grid: SH967065
- Mapcode Local: GBR 9H.6B2V
- Mapcode Global: WH68C.SQ8J
Location and coordinates are for the approximate centre of Nant yr Eira within this administrative area.
Geographic features and populated places may cross administrative borders.