Errigal is a 751-metre mountain near Gweedore in County Donegal, Republic of Ireland.It is the tallest peak of the Derryveagh Mountains, the tallest peak in County Donegal, and the 76th tallest peak in Ireland.Errigal is also the most southern, steepest and highest of the mountain chain, called the "Seven Sisters" by locals. The Seven Sisters includes Muckish, Crocknalaragagh, Aghla Beg, Ardloughnabrackbaddy.
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