Leenaun nestles at the foot of the Maumturk mountains at the head of the Killary. From here the Western way follows the N59 for 2.5 kilometres to the County Mayo border at Aasleagh. Please take care as this is a national route.
The name Leenaun means the shallow sea bed, somewhat ironic as it sits at the head of the Killary fjord and fjords are renowned for their depth. The Killary is 16 kilometres long and 45 metres deep in places. Leenaun is a haven for geologists due to its great variety of sedimentary, volcanic and metamorphic rocks. Today the hiker will see mussel rafts and salmon cages floating on the fjord.