Barnesmore Gap

Barnesmore Gap (Irish: An Bearnas Mór, meaning 'the big gap') is a mountain pass or gap (elevation 117 m) situated in the Bluestack Mountains, County Donegal, Ireland.

It is an area of complex geology, but its main feature is granite formed in the Devonian period, 400million years ago.

The gap held glaciers in the Last Glacial Period flowing to the Atlantic through what is now Donegal Bay, up to about 13000 years ago.54°43′19″N 7°56′53″W / 54.72208°N 7.94812°W / 54.72208; -7.94812[1] According to a 17th century Hiberno-Latin history of Donegal Abbey, the Gap of Barnesmore was once home to a large population of wild red deer.

The company pioneered the use of diesel rail-cars which ran through the gap up to the late 1950s, connecting Stranorlar in the east to Donegal Town, and through to Killybegs in the west.

This article related to the geography of County Donegal, Ireland is a stub.