It has stepped sides, a small flattened summit of roughly five metres across, and a base that spans some twenty-eight metres. Young trees have taken hold on its slopes. The whole thing has the quiet presence of something that was once very deliberately constructed, though what it commemorates or marks has been swallowed by time.

A barrow, in the archaeological sense, is a burial mound, typically raised during the Bronze Age or earlier, and used to inter the dead beneath a covering of earth and sometimes stone. They are found across Ireland in various forms, from large passage tombs to modest ring barrows, and their survival into the present often depends on sheer luck, a hillside that escaped the plough, or, as here, the edge of a landed estate. This particular mound has been preserved in part by the boundary wall of the Johnstown Castle demesne, which retains it on one side. A road running northeast to southwest has, however, clipped the mound at its northwestern edge, truncating what must once have been a more complete and symmetrical form. The tension between the two is quietly telling: one human intervention preserved it, another cut into it.

The mound sits on level ground, which makes it all the more conspicuous in the landscape. Visitors to the Johnstown Castle estate, which now operates as an agricultural museum and research centre, may glimpse it near the demesne wall, its stepped profile and tree-covered crown distinguishing it from any ordinary rise in the earth.