What remains at Dromin is not a dramatic fortification but a rath, the most common type of early medieval enclosure in Ireland, typically a circular earthwork built to define a farmstead and signal its owner's social standing. Here, only an arc of bank survives on the northern to south-eastern side, roughly 26 metres in length, softened now by overgrowth. The interior height of the bank reaches about 1.2 metres, the exterior face a little more at 2.3 metres, and it runs about 2.5 metres wide. To the south-east and south, there is a fainter trace, a low rise in the ground where a second bank has been largely levelled, perhaps by centuries of ploughing or grazing.

The full enclosure was once roughly 30 metres in diameter, and its circular shape was clearly legible when the Ordnance Survey mapped the area in both 1846 and 1895, recording it on their six-inch sheets as a distinct circular enclosure. That two separate surveys, half a century apart, both captured it suggests the earthwork was more pronounced then than it is today. The intervening period of agricultural use has done what generations of Kerry weather alone could not quite manage, reducing what the maps once showed as a clear ring to a partial arc and a whisper of a second bank beneath the grass.