Great Sugar Loaf (, meaning lump of Cualu) at , is the 404th-highest peak in Ireland on the Arderin scale, however, being below 600 m it does not rank on the Vandeleur-Lynam or Hewitt scales. The mountain is in the far northeastern section of the Wicklow Mountains, in Ireland, and overlooks the village of Kilmacanogue. The profile of the mountain means it can be mistaken for a dormant volcano. It owes its distinctive shape, however, to the erosion-resistant metamorphosed deep-sea sedimentary deposit from which its quartzite composition was derived.