No earthwork rises above the surface, no stonework pokes through the grass, and the Ordnance Survey's historic mapping never recorded anything here at all. The only evidence that this field holds an ancient enclosure is a semicircular pattern that appears in the crop above it, a cropmark, which forms when buried ditches or banks influence how plants grow, leaving ghostly outlines visible from altitude that are entirely invisible at ground level.

The enclosure at Kilballyowen came to light during the Bruff aerial photographic survey of 1986, recorded under reference AP 5/2053. From the air, it reads as a semicircle roughly 35 metres in diameter, sitting immediately west of the road that also marks the townland boundary with Knockainy West. Because it was never mapped by the Ordnance Survey in any of its historic editions, it had simply gone unrecorded until that survey flight passed overhead. Subsequent satellite and aerial imagery has confirmed what the 1986 photographs showed. The monument is visible on Ordnance Survey Ireland orthoimagery taken between 2005 and 2012, on Digital Globe imagery from 2011 to 2013, and on a Google Earth image captured as recently as September 2020. A second, fainter feature also appears in the earlier orthoimage: an oval-shaped cropmark measuring approximately 25 metres east to west and 21 metres north to south, abutting the main enclosure to its west. Whether that second mark represents a related structure, an earlier phase of use, or something else entirely remains an open question. The record was compiled by Alison McQueen and Vera Rahilly and uploaded in November 2020.

There is nothing to see on the ground here in any conventional sense. The field is reclaimed pasture, the road beside it is unremarkable, and no surface trace of the monument survives. The site is most honestly appreciated through the aerial images that revealed it, which show the semicircular cropmark with reasonable clarity during dry summer conditions when soil moisture differences are most pronounced. For anyone passing through this corner of south County Limerick, the road itself marks the townland boundary, which gives a faint geographic anchor. The real detail, though, lies in the archive photography and the orthoimage layers, where the outline of something that may have stood here for centuries quietly persists.