The enclosure at Kilmona is roughly circular, measuring around 93 metres north to south and 80 metres east to west, and it sits on a gentle north-facing slope under ordinary pasture. What marks it out is the earthen bank that still traces most of its perimeter, rising about 1.2 metres on its outer face, with a possible entrance gap of just over four metres to the south-east. Inside, there is nothing to see. The grass grows evenly; no stone, no mound, no indication of what the 1842 Ordnance Survey six-inch map recorded there as both a church and a burial ground.

The name preserves what the ground no longer shows. According to the scholar O'Donoghue, writing in 1986, Kilmona derives from the Irish Cill Mona, meaning the church of St Mona, a dedication that points to an early medieval ecclesiastical foundation. Enclosures of this kind, roughly circular earthworks defining a sacred precinct, are a characteristic form of early Irish monastic and church sites, their shape often predating the Norman period by several centuries. Whatever structures once stood here, whether timber or stone, they have left no visible trace above ground. The burial ground, however, has not been entirely forgotten. Local tradition still carries the memory of it, even as the physical evidence has been absorbed back into the landscape.