Locally it has always been called "the Moat", a name that carries considerable weight in Irish placename tradition, typically attached to earthworks associated with early medieval ringforts, mottes, or older ceremonial sites. The mound itself is modest, an oval of grass and scattered bushes, measuring roughly 19 metres north-east to south-west and 11 metres across, rising only between 0.2 and 1 metre above the surrounding ground. Nothing about it announces itself.

What makes it worth pausing over is the gap between local memory and physical reality. The Ordnance Survey's six-inch map of 1839 recorded it as a circular mound with a top diameter of approximately 15 metres and a base spreading to around 40 metres, suggesting something considerably more defined than what survives today. A motte, the type of earthwork introduced by the Normans in the twelfth century as the earthen platform for a timber tower, typically presents as a steeply sided mound of that general scale. Whether this was ever a true motte, an earlier prehistoric burial mound, or simply a natural feature that accumulated layers of local legend and cartographic interpretation is not established. What the 1839 map captured and what exists on the ground now differ enough to suggest centuries of gradual erosion, agricultural pressure, or both. The Grange Demesne location, on the lower foothills of the Blackstairs range, places it in territory that saw significant Norman activity, and the enduring use of "the Moat" as a local name hints at a long-standing awareness that something deliberate once stood here.