A ringfort, the most common type of early medieval enclosed settlement in Ireland, typically takes the form of a roughly circular area bounded by one or more earthen banks and ditches. At Pullis, that arrangement is still legible in the landscape, even if only just.

When the site was recorded in 1968, it presented as a circular overgrown area roughly 35 metres in diameter, defined by an earthen bank and a complete outer fosse, which is the ditch running around the outside of the bank. At the south-east, the bank measured nearly 4.5 metres across at its base, with an external height of almost 2 metres. An entrance, just under 3 metres wide at the base, opened at the south-east, approached by a causeway spanning the fosse. The whole thing was positioned at the northern end of a north-south drumlin ridge, the kind of elongated glacially deposited hill that gives Monaghan much of its characteristic rolling topography, and the elevated position would have given its original occupants a clear view of the surrounding land. By 1984, the scrub that had once concealed the monument had been cleared, and the site had been reduced considerably, flattened to a low grass-covered mound. Even so, its circular outline remained traceable on the ground, a faint but coherent signature of something carefully built and long inhabited.