At first it reads as an ordinary field rise, but the geometry is too deliberate: a flat-topped circular mound, roughly 21.6 metres across at the base and between 1.9 and 2.4 metres high, with a second, smaller mound sitting centrally on its summit like a cairn placed on a plinth. That inner mound measures about seven metres in diameter and stands 0.7 metres above the summit platform, giving the whole structure its stepped, tiered profile. Encircling the base is a shallow fosse, the kind of enclosing ditch commonly found around prehistoric burial and assembly monuments, here between 2.6 and 3.4 metres wide and about 0.6 metres deep. A low, narrow bank survives at the southern outer lip of the fosse, though its date remains uncertain. A modern field wall has since been built across the northeastern and eastern section, quietly burying part of the ditch beneath more recent agricultural tidying.

The mound sits within the territory once known as Tír Fhiachragh, the ancient kingdom covering much of what is now County Sligo. Research by Elizabeth FitzPatrick, published in 2001 in the Proceedings of the Royal Irish Academy, placed this monument within a wider landscape of assembly and gathering sites associated with that kingdom, and it was in that same work that the mound's local name was recorded: Coggin's Hill. The name suggests the monument was meaningful enough in local memory to attract a personal name, though what Coggin refers to, and whether it preserves any older tradition, goes unrecorded. FitzPatrick's broader investigations in the area also considered the cultural landscape around Aughris, the coastal headland to the southwest, and the ways in which communities historically worked and understood this stretch of the Sligo shoreline.