What survives is a parch mark, a circular patch of discolouration roughly thirty metres across that appears in dry conditions when buried features beneath the soil cause vegetation above them to die back or grow differently. Surrounding it, a diffuse cropmark traces the line of a fosse, the filled-in ditch that once defined the boundary of an enclosure. Neither is visible to someone walking the field; both appeared clearly enough in an aerial photograph taken in July 1989.

Circular enclosures of this kind are common across Ireland, typically associated with early medieval settlement, though without excavation it is impossible to say with certainty what function any individual example served. They range from ringforts used as farmsteads to enclosures with religious or ceremonial purposes. What makes the Killetra site quietly interesting is the suggestion, faint but legible in the aerial photograph, of a second conjoined circular enclosure immediately to the south-east, as though a smaller or later feature was added alongside the first. A short distance to the north, in the adjacent field, two further enclosures have been recorded separately, which may indicate that this stretch of ground was used and organised by people over a considerable period, though the relationship between the sites remains unknown.