CrocknalaragaghCrocknalaragagh is a mountain in County Donegal, Ireland, with a height of 471 m.GeographyIt is the second-most northern and the lowest of the mountain range locally called the Seven Sisters which also includes Muckish, Aghla Beg, Ardloughnabrackbaddy, Aghla More, Mackoght and Errigal. All of the Seven Sisters are part of the Derryveagh Mountains.