Mynydd Bodafon is the highest point on the island of Anglesey (although not in the county of Anglesey — see Holyhead Mountain). Its summit is also known as Yr Arwydd ("the signal"). It lies about 2½ miles west of the coastal town of Moelfre and ⅔ of a mile south-west of the hamlet of Brynrefail. The meaning of Bodafon is obscure.