Not obscured by trees or overgrowth in any obvious way, not hidden behind a wall, simply not visible at ground level. It is the kind of site that rewards the historically curious precisely because there is almost nothing to reward them with, at least not in any conventional sense.

What is known about it comes largely from cartographic and archival sources rather than from the ground itself. The 1843 Ordnance Survey six-inch map records an enclosure roughly 25 metres in diameter on the north-western slopes of Carrickgollogan, with linear earthworks extending to its north-west. A sketch plan preserved in the OS Memoranda, discussed by O'Flanagan in 1927, appears to show not just the ringfort itself but an associated field system, suggesting this was once a working agricultural settlement of some kind. Ringforts, which were typically circular enclosures of earth or stone used as farmsteads during the early medieval period, are among the most common archaeological monument types in Ireland, with tens of thousands recorded across the country. What makes this one quietly interesting is the combination of its apparent field system and its near-total disappearance from the visible landscape, despite sitting in a relatively accessible location overlooking the Loughlinstown river valley.

The site sits on the lower north-western slopes of Carrickgollogan, a hill in the Dublin Mountains best known for the landmark lead-smelting chimney stack that rises from its summit. Anyone approaching from that direction will find the general area easy enough to locate, but identifying the ringfort itself is a different matter. Given that it does not register at ground level, the OS historical mapping, now freely available through the Tailte Éireann geoportal, is probably the most useful tool for getting a sense of where the enclosure once sat in the landscape. The valley below offers some orientation, and the context of the surrounding terrain, sloping ground, the river valley beyond, makes it easier to imagine why someone might have chosen this particular spot to settle.