It is not. This is a ring barrow, a type of Bronze Age or Iron Age funerary monument in which a burial mound was encircled by a ditch, or fosse, and sometimes an outer bank. The ditch at Coolmore has long since been filled in, most likely through generations of ordinary farming activity, leaving the mound itself as the only visible trace of what was once a more elaborate ritual landscape.

The site has been documented on Ordnance Survey maps since at least 1842, when it appeared as a hachured circular enclosure measuring roughly 18 metres in diameter. By the time the six-inch OS map was revised in 1936, the recorded diameter had reduced slightly to around 15 metres, which may reflect the gradual flattening of the monument over the intervening century. Today the mound measures approximately 19.5 metres east to west and 18.4 metres north to south at its outer limits, with a broadly level top. The slight discrepancy between the historical map measurements and the current dimensions is a reminder of how imprecise early cartographic survey could be, and how much a monument can change simply through the passage of agricultural time. Local knowledge preserves the memory of the surrounding fosse, even though the ground itself no longer shows it.