Killary Harbour/An Caoláire Rua is a fjord located in the west of Ireland in the heart of Connemara which forms a natural border between counties Galway and Mayo.
It is 16 kilometres long and in the centre over 45 metres deep. It is one of three glacial fjords that exist in Ireland, the others being Lough Swilly and Carlingford Lough.
On its northern shore lies the mountain of Mweelrea, Connacht's highest mountain, rising to 814 metres. To the south rise the Maumturk Mountains and the Twelve Bens. The area contains some of Ireland's most awe-inspiring and dramatic scenery.