A line of rough stone embedded along the outer edge of that gap suggests it may not have been the original entrance, which means whoever made the opening did so sometime after the fort was first built, for reasons that have since been forgotten.

Ringforts, known in Irish as raths, were the most common form of enclosed settlement in early medieval Ireland, typically dating from roughly the fifth to the twelfth centuries. They served as farmsteads, their earthen banks and external ditches, called fosses, providing a degree of protection for livestock and household activity rather than any serious military defence. This example at Laght sits on the upper edge of a steep south-easterly slope overlooking the Owenbaun River valley, with the ground rising again to the north, a position that would have given its occupants a clear view down the valley. The enclosure measures approximately 33 metres across, and the earthwork is more substantial in some places than others: where the natural hillside offered less protection, the bank reaches a scarp height of 2.2 metres, while the southern and south-eastern arc is defined by a combination of bank and fosse. The interior has been levelled on its southern side to compensate for the natural slope of the ground, a detail that speaks to the practical engineering involved in constructing what might otherwise seem a simple earthwork. By 1842, when the Ordnance Survey recorded it on their six-inch map, it was already noted as a bivallate enclosure, meaning it appeared to have two enclosing elements, though the fosse on the northern arc has since become very shallow.

Today the fosse, bank, and interior have been planted with coniferous trees, which both preserve the earthwork from agricultural disturbance and make it harder to read as a coherent structure at ground level. A cattle gap in the northern bank and field boundaries running along the south-western, western, and northern edges show how thoroughly the rath has been absorbed into the working landscape around it.