Once a complete enclosed space roughly 31 metres across, it is now defined only by a degraded bank and a shallow external fosse, the ditch that originally ran around the outside of the bank, giving the whole structure its sense of boundary and enclosure. Quarrying has removed the eastern and south-eastern arc entirely, and along the southern edge a field boundary has been laid directly over where the fosse once ran, so that the modern agricultural landscape has quietly absorbed and erased what earlier inhabitants once deliberately constructed.

Structures of this kind belong to a broad tradition of enclosed settlements scattered across early medieval Ireland. A ringfort, essentially a farmstead defended by one or more circular banks and ditches, housed a family or small community and their livestock, and many thousands of them survive across the country in varying states of preservation. The Gortnaglogh example is notable less for what it retains than for what its partial survival reveals: the competing pressures that have worked against such sites over centuries, from stone quarrying to the steady imposition of later field systems. That it survives at all in any form is largely a matter of the western portions having escaped the worst of that attention. A second ringfort, a separate and presumably related site, sits roughly 100 metres to the north-east, suggesting that this particular patch of north Galway once supported a small cluster of enclosed settlements, each within sight of the other across the low rises of the land.