Lough Mask, Lake in County Mayo, Ireland
Lough Mask is a large freshwater lake in County Mayo, in the west of Ireland, running about 10 miles (16 km) in length. Its limestone bed gives the water a light tone, and its shoreline alternates between rocky outcrops and open grassy edges with small islands scattered across the surface.
Lough Mask was shaped by glaciers during the last Ice Age, which carved out the limestone basin now filled with water. In the 19th century, the land around it became known for tenant disputes tied to the Land League movement, which drew national attention to the region.
Lough Mask has long been a gathering place for anglers, and that tradition still shapes how people relate to it today. Visitors and locals share tips along the shore, and the lake carries a quiet reputation among fishing communities across Ireland.
The lake is reachable by road from several directions in County Mayo, and boat rentals are available nearby for those who want to get out on the water. Spring and early summer tend to offer the most settled weather for a visit.
Lough Mask and the neighboring Lough Corrib are connected not by a visible river but through an underground network of limestone channels. Water moves between the two lakes beneath the surface, which makes their shared boundary invisible to anyone standing on the shore.
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