It is the kind of site that exists more fully on paper than on the ground, at least from any accessible vantage point, because permission to visit has been refused.

What is known comes largely from cartographic and aerial evidence. The enclosure appears on Ordnance Survey maps from both 1842 and 1897, suggesting it was a sufficiently distinct feature to be recorded across two separate mapping campaigns over half a century apart. More intriguingly, it also registers on Geological Survey of Ireland aerial photographs as a possible crop mark. Crop marks appear when buried or partially buried structures affect how vegetation grows above them, causing subtle differences in colour or height that become visible from the air, particularly in dry summers when grasses and cereals respond differently over disturbed or compacted soil. That this enclosure produces such a signal hints at subsurface remains that surface observation alone would never reveal. Circular enclosures of this kind in Kerry are often associated with early medieval settlement, the ringfort tradition that shaped the Irish countryside for several centuries after roughly 500 AD, though without access or excavation, any such attribution here remains speculative.

The site was documented in C. Toal's North Kerry Archaeological Survey, published in 1995, which catalogued a wide range of monuments across the region. The enclosure at Lerrig sits in that survey as an entry defined more by its constraints than its contents, a shape on a map, a shadow in a field, its deeper story still unread.