The site at Lismacteige was identified from OS Aerial Premium orthophotographs taken between 2012 and 2018, where the faint traces of mound walls running from the north to the south-west suggest an oval structure roughly 63 metres along its north-east to south-west axis and approximately 55 metres across. That is a substantial footprint, comparable in scale to many of the ringforts scattered across the Irish landscape, though whether this site belongs to that tradition remains an open question.

Enclosures of this kind, defined by earthen or stone mound walls, were a common feature of early medieval Ireland, used variously as farmsteads, ceremonial spaces, or sites of local assembly. The name Lismacteige is itself suggestive: "lios" in Irish placenames typically refers to an enclosure or fort, hinting that local memory may have preserved some awareness of a boundary or enclosed space here long before aerial survey technology made it visible again. The enclosure sits near the valley floor, with open views from the south around to the north-west over the Rathborney River, a position that would have offered both surveillance of the surrounding land and access to water. Ros Ó Maoldúin, who noted the site from the aerial imagery, has flagged it as a possible rather than confirmed structure, meaning it awaits the kind of field investigation that might settle its character and date.