Measuring fifteen metres in diameter and rising to about 1.8 metres, it is modest in scale but carefully made, its southern edge still defined by a kerb of small boulders that once gave the whole structure a clean, intentional boundary.

Mounds of this kind are scattered across the Irish landscape and can belong to a broad range of periods and purposes, from prehistoric burial monuments to later earthworks associated with territorial or ceremonial use. What complicates the picture at Mullycagh is that a field boundary cuts straight through the mound, bisecting it, and the southern half has been considerably worn down as a result. The northern portion survives in better condition, where the kerbing remains visible, but the division makes it difficult to read the site as a whole. The relationship between the mound and the glen it overlooks, with the ground falling away steeply to the east, suggests whoever chose this location was attentive to the landscape around them.