Knockalongy () is a 544 m (1,785 ft) Marilyn in County Sligo, Ireland. It is the highest of the Ox Mountains. The nearest village is Skreen. There are many megalithic tombs on the plain between Knockalongy and Sligo Bay to the north. There are also two small loughs at the foot of the mountain—Lough Aghree and Lough Minnaun. See also List of mountains in Ireland References Marilyns of Ireland Mountains and hills of County Sligo