The feature is only legible at all because someone looked down at it from the air; at ground level, most of it has been reduced to a low grassy swell, half a metre high and roughly two and a half metres wide, curving from the north-north-west around through the east to the south-south-east. On the remaining arc, only the inner face survives as a rocky scarp, a faint lip in the earth rather than anything that reads as a wall. Roughly thirty metres across in either direction, it is large enough to have enclosed a small farmstead or animal pen, but worn enough that its original purpose can only be inferred.

The site came to light through aerial reconnaissance carried out by Markus Casey, whose work across the west of Ireland has brought a number of similarly inconspicuous earthworks into the archaeological record. From altitude, cropmarks and shadow can reveal the geometry of features that are all but invisible on foot, and this enclosure is a good example of why that method matters. A gap of about three metres on the eastern side may represent an original entrance, which would be consistent with the orientation seen at many early enclosures across Ireland. The site sits within a broader field system and lies roughly a hundred metres north of a cashel, a type of early medieval stone-walled enclosure typically associated with a single farmstead or family group. Whether the two features are contemporary or belong to different periods of use, the landscape around Kiltullagh was clearly organised and worked over a long span of time.