A slightly lower plateau extends away to the south-west of the summit, and the landform itself is clear enough, but what was once said to have stood here has effectively vanished, leaving behind little more than a rumour preserved in the archaeological record.

Local tradition, gathered in the 1940s, held that a fort once occupied this elevated position. Hilltop forts are a recurring feature of the Irish landscape, often ringforts or the earthen remains of enclosures used for settlement or defence across the early medieval period, but at Rossnaglogh no visible trace of such a structure has been identified, and no physical evidence has come forward to confirm what locals once believed. The account sits in an uncertain space between memory and archaeology, the kind of place where oral tradition has outlasted whatever it was describing. Whether the fort was dismantled, ploughed out, or simply misremembered is unknown.