The northeasternmost of the group is what archaeologists classify as a boulder-burial, a form of megalithic monument found almost exclusively in Munster, in which a large, roughly flat-topped stone is raised slightly off the ground on one or more smaller support stones, creating a low but distinct chamber beneath. The supporting stone here is visible under the boulder's southwestern side, propping up a roughly square slab measuring about 1.2 metres across and standing 0.65 metres from the ground.

What makes the Kilmore site quietly compelling is not any single monument but the arrangement as a whole. The four boulder-burials are set out along a northeast to southwest axis, spanning a total length of eight metres, which suggests a shared purpose or a sequence of related interments rather than four independent decisions made at different times. The nearest neighbour in the line sits less than a metre to the southwest of this stone, and a standing stone lies approximately six metres to the southeast, further indicating that this level patch of ground was, at some point in the prehistoric past, a deliberately organised ritual or funerary landscape. Boulder-burials are generally associated with the Bronze Age, though precise dating for individual examples remains difficult without excavation.