A cairn, in the prehistoric Irish context, is a mound of heaped stone, often raised over a burial or as a territorial marker, and this one on the hill's western slope is a substantial structure: roughly thirty-five metres across and three metres high. Yet at ground level, it does not read as a monument at all. The hill has absorbed it, and what was once a deliberate, labour-intensive act of commemoration now passes for ordinary hillside.

The cairn sits on a gentle west-facing slope that looks out over the flat plains of Kildare, a view that almost certainly mattered to whoever chose this spot, whether for the drama of the prospect or for some more practical reason of visibility and territorial claim. The earliest recorded description of the site appears in Liam Price's 1934 survey of Wicklow antiquities, which noted its dimensions but offered little else. Price was a Dublin judge and amateur archaeologist whose fieldwork through the 1930s documented dozens of monuments across the county, many of which would otherwise have gone unrecorded. Without that work, a monument as self-effacing as this one might have slipped entirely from notice.