What it actually represents is an early enclosure, the kind of roughly oval earthwork that once defined a domestic or agricultural space in early medieval Ireland, its boundary formed not by standing walls but by a scarp, a low earthen edge cut or built up from the surrounding ground. Here that scarp measures approximately forty metres east to west and thirty-six metres north to south, tracing an oval that is still legible in the ground despite centuries of weathering and agricultural activity.

The enclosure sits on a low rise, which is typical of the form. Early Irish enclosures of this kind were often positioned to take advantage of slight elevation, improving drainage and visibility around a farmstead or small settlement. The earthwork here is poorly preserved, with the scarp fading entirely at the northeast and southwest, but enough of the outline survives to give a sense of the original shape. What makes the Gortnalone site particularly interesting is its immediate context: two further enclosures lie within a hundred metres, one to the southwest and one to the southeast. That clustering hints at a small concentration of early activity in this part of north Galway, whether contemporary occupation spread across neighbouring plots, or successive reuse of the same general area over generations.