An esker is a long, winding ridge of gravel and sand deposited by meltwater streams beneath a retreating glacier, and this one provides the natural platform on which the enclosure was formed. What marks it out is the subtlety of its survival: rather than a dramatic raised bank, the monument is defined by a shallow scarp on its eastern and south-eastern arc and a more gradual slope where it merges into the natural hillside to the north-west. Running along the outside, a fosse, essentially a ditch dug to reinforce the boundary, shows up most clearly as a darker band of grass, the kind of colour difference that aerial photography catches better than the naked eye on the ground.

The enclosure measures roughly 16 metres north to south and 25 metres east to west at its interior, with the overall footprint extending to approximately 31 by 34 metres when the banks and fosse are included. Its interior slopes gently toward the west. Within the south-eastern sector, a small sunken area has been noted, and it may represent the remains of a barrow, a burial mound, suggesting the site could have accumulated significance across more than one period of prehistoric use. Enclosures of this kind, broadly oval or circular earthworks defined by bank and ditch, appear throughout Ireland and are associated variously with settlement, stock management, ritual, or some combination of all three, though without excavation it is rarely possible to say with certainty which purpose a particular example served. The relationship here between the enclosure and the natural topography of the esker terminus, where the ridge ends and the ground opens out, seems deliberate rather than incidental.