Cwm Gast, Powys

• Parish/Community: Glantwymyn
• Unitary Authority: Powys
• Region: Wales

• Category: Geographic Feature
• Type: Valley

• Latitude/Longitude: 52°40'20"N 3°41'14"W
• Eastings/Northings: 285999, 309638
• OS Grid: SH859096
• Mapcode Local: GBR 99.4LRS
• Mapcode Global: WH689.B3B3

Location and coordinates are for the approximate centre of Cwm Gast within this administrative area. Geographic features and populated places may cross administrative borders.