The site measures roughly 40 metres in diameter and was identified from a cropmark, the kind of faint discolouration in growing crops that betrays buried ditches and banks to aerial cameras even when nothing is visible at ground level. The enclosure's fosse, the outer ditch that would originally have defined the perimeter, is what the cropmark traces, showing where soil disturbance and differential moisture retention have left their long signature in the earth.

What makes the Outrath enclosure particularly telling is the way earlier mapmakers and farmers unconsciously memorialised it long after it had physically disappeared. On the first edition Ordnance Survey six-inch map of 1839, the monument had already been largely levelled, yet the townland boundary takes a deliberate curving kink along the south-east to south portion of the circuit, and a field boundary bends noticeably along the western sector. These small deflections in otherwise practical lines of demarcation suggest that local memory, or simply the ghost of a surviving bank, was still shaping how people divided the land even as the monument itself faded. By the 1947 revision of the OS map the same curves persist, carrying the enclosure's outline forward another century without anyone necessarily knowing what they were preserving. It was only the aerial photograph taken on 9 July 1964, as part of the Cambridge University Collection of Aerial Photography, that confirmed what the boundaries had been quietly recording all along. Two further enclosures of the same type lie roughly 370 metres to the west, also visible as cropmarks, suggesting this corner of Kilkenny was once a more densely organised landscape than its present fields imply.