Lettertrask [Leitir Treasc]

Sitting on the coastal fringe of the Nephin Begs, this Marilyn offers an exceptional vantage point over Clew Bay’s drowned drumlin landscape. The terrain is typically Mayo—rough, heathery, and often saturated—but the reward is a clear sightline across the water to the cone of Croagh Patrick and the wild Curraun Peninsula.

• •The name derives from the Irish Leitir Treasc; while 'leitir' refers to a wet hillside, 'treasc' usually translates as dregs or spent grain, likely a historical reference to the poor, marshy quality of the grazing land on these lower slopes.
• •The summit provides a spectacular perspective of the Clew Bay drumlins, a 'drowned' glacial landscape where over 360 limestone mounds rise from the Atlantic to form a unique archipelago.
• •Despite its modest height of 279 metres, it is classified as a Marilyn because it sits in relative isolation, with the land dropping at least 150 metres on all sides before rising toward the higher peaks of the interior range.
• •In this corner of County Mayo, the distinction between a hillside and a swamp is often purely theoretical; gaiters are less of a choice and more of a survival requirement.