The enclosure measures around sixty-three metres north to south and sixty-one metres east to west, defined by a bank and a shallow external fosse, the kind of defensive or boundary ditch typical of early medieval ringforts and enclosures across Ireland. The fosse survives along the north-eastern to south-eastern arc, while a shallow depression runs along the interior on the opposite side. The surface within is level, grass-covered, and offers no obvious clue as to what the place once was or who shaped it.

The name may be the most telling detail. On the Ordnance Survey six-inch maps, the site is marked as "Caltragh", a word that scholars have connected to the Irish "Cealtrach", meaning an old burial ground. The connection was noted by P.W. Joyce in his 1923 study of Irish place names. If that etymology is correct, this unremarkable field may once have served as a pre-Christian or early Christian burial site, a category of place that tends to leave little visible trace beyond the earthwork itself and the memory carried in the name. The physical form of the enclosure, with its bank and external ditch, does not rule out other functions, and no excavation appears to have resolved the question. The ground keeps its own counsel.