The shore of the bay known as Killary Harbour marks the border seperating the counties of Galway and Mayo. To the east is Croagh Patrick, Louisburgh, a conical mountain on which St Patrick spent the 40 days of Lent in AD 441, before defeating the pagan deity Crom, and from this peak rang his bell and banished all the reptiles from Ireland - which is the reason there are no snakes in Ireland to this day. The climb begins beside the beautiful ruin of Murrisk Abbey, a 14th-century Augustinian foundation.
Spectacular views await climbers at the summit.
To the south the Twelve Pins can be seen, and to the north is island-studded Clew Bay.