Set into the break of slope on a ridge in Craggera, this early medieval ringfort, or rath, a circular enclosure typically built to protect a farmstead and its livestock, barely announces itself above the surrounding pasture. Its defining bank stands no more than half a metre above the ground on its outer face, reduced in places to little more than a low scarp. Without knowing what to look for, a walker might cross it without a second thought.

The rath occupies the north-eastern end of a small ridge running north-east to south-west, positioned on the gently sloping south-east-facing side. To the west, about 100 metres away, a rocky stream valley cuts through the landscape; to the east, the Ox Mountains rise as a backdrop. The enclosure is roughly circular, measuring 21 metres north-west to south-east and 23 metres north-east to south-west. The interior follows the natural contours of the ridge, with a level area toward the north-west from which the ground drops away to the north and more sharply to the east and south-east. There is no clearly defined entrance, which is not uncommon in raths of this kind, and an arc of stony ground about three metres wide runs along the slope outside the bank to the south. What is perhaps most telling about the wider landscape here is that a second rath sits just 200 metres to the south-west on the same ridge, suggesting that this corner of Mayo once supported a small cluster of early farmsteads, each within sight of the other across the boggy, rock-scattered ground.

The perimeter is ringed with hawthorn, and gorse has colonised the interior, giving the site a rough, untended texture that quietly marks it out from the surrounding pasture. That vegetation, common to old earthworks across Ireland, tends to take hold precisely because the ground has been left undisturbed.