- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 52°19'41"N 3°25'37"W
- Eastings/Northings: 302851, 270967
- OS Grid: SO028709
- Mapcode Local: GBR 9M.VJWR
- Mapcode Global: VH690.KR42
Location and coordinates are for the approximate centre of Cwm yr Og within this administrative area.
Geographic features and populated places may cross administrative borders.