To the south-east, the ground drops sharply to a natural terrace below. The cairn itself is not enormous, measuring approximately 11.5 metres on its north-east to south-west axis and around 10 metres across the other way, rising to about 2 metres in height, but its placement is deliberate and its shape, subcircular and tapering upward, gives it a purposeful quality that sets it apart from the natural outcrops common to this kind of limestone terrain.

Cairns of this type are among the oldest human-made structures in Ireland, typically raised as funerary or memorial monuments during the Neolithic or Bronze Age periods. Karst limestone landscapes, formed by the slow dissolution of soluble rock, produce the kind of exposed, dramatic uplands where such monuments are often found, perhaps because elevation carried significance, or because the terrain itself was already perceived as marked or otherworldly. Mullagh More in Glenquin sits within a part of County Clare where this kind of upland geology shapes both the scenery and the archaeology beneath it.