Mynydd St John or Cefn Tre-ysbyty, Powys

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

• Category: Geographic Feature
• Type: Hill or Mountain

• Latitude/Longitude: 52°46'20"N 3°31'14"W
• Eastings/Northings: 297500, 320500
• OS Grid: SH975205
• Mapcode Local: GBR 6H.YH7S
• Mapcode Global: WH67S.WLM0

Location and coordinates are for the approximate centre of Mynydd St John or Cefn Tre-ysbyty within this administrative area. Geographic features and populated places may cross administrative borders.