- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°57'32"N 3°37'31"W
- Eastings/Northings: 290905, 341406
- OS Grid: SH909414
- Mapcode Local: GBR 6C.KMSD
- Mapcode Global: WH66S.8WSJ
Location and coordinates are for the approximate centre of Cwmtirmynach within this administrative area.
Geographic features and populated places may cross administrative borders.