The first edition of the Ordnance Survey six-inch map recorded it as a circular earthwork roughly twenty metres across, later pressed into further service by having a trigonometrical station, a fixed surveying marker, planted on top of it. What survives today is considerably smaller in appearance: a platform about 8.9 metres in diameter, edged by a scarp rising to about 1.2 metres at its highest point. Near the centre of the northern half, there is a low grassed-over heap of stone, only 1.2 metres across and barely 0.2 metres high, whose purpose is uncertain; it may be the remains of a structure, or it may simply be a landscaping feature from the demesne era.

The site belongs to a class of monuments loosely described as raths, the earthen ringforts that were once among the most common features of the Irish countryside, typically used as enclosed farmsteads during the early medieval period. Writing in 1914, a researcher named Neary grouped this earthwork with a neighbouring one, describing both as circular, earthen raths that had by then been reduced to mere mounds about 1.82 metres above the roadway within Prospect demesne. The pairing with that neighbouring monument suggests the two were once understood as a related set of features, though the record of each has since diverged. The discrepancy between the twenty-metre diameter noted on the old Ordnance Survey map and the 8.9 metres visible today likely reflects the difference between measuring the full extent of the surrounding earthwork and measuring only the raised platform at its core.