It sits in pasture on a gently sloping terrace overlooking Killala Bay, protected as a National Monument, and yet its basic nature remains, in the careful language of the archaeologists who recorded it, "doubtful." That ambiguity is part of what makes it worth attention.

The confusion goes back at least as far as the first Ordnance Survey mapping of the area. On the 1838 six-inch map, the mound appears as a simple oval outline with no label. By the time the 25-inch edition was produced, it and a neighbouring stone circle some 50 metres to the north-east had both been grouped under the heading "Cromlechs", a term once used loosely for megalithic monuments of various kinds, and both were shown as rough circles of boulders. The 1922 six-inch edition kept the "Cromlech" label but assigned different symbols to each: a rock symbol for the mound, a dolmen-type symbol for the stone circle next door. The cartographers, in other words, kept changing their minds. When Ruaidhri de Valera and Seán Ó Nualláin surveyed it in 1964, they described a roughly oval earthen mound, up to a metre high, measuring approximately 11.5 metres east to west and 9 metres north to south, with around nine stones embedded along its perimeter. None of those stones appeared to have been deliberately set, and the mound itself had been used as a convenient dump for field clearance stones, which muddied any reading of its original form further. Roughly 5 metres to the north, a single upright stone stands alone, 1.25 metres long, suggesting some deliberate arrangement that the mound itself no longer makes legible. De Valera and Ó Nualláin concluded that it might once have been a stone circle, comparable to its better-preserved neighbour to the north-east, but stopped well short of certainty.

The mound sits close to a stone circle that is itself a scheduled monument, and the two together, on that ridge with open water visible below, give some sense of how deliberately this elevated position was chosen by whoever built here. The erect stone north of the mound is easy to overlook among the field clearance debris, but it is the detail that most rewards a careful second look.