A ringfort, or rath, is a roughly circular enclosure built in the early medieval period, typically between the fifth and twelfth centuries, and used as a farmstead or place of habitation. Thousands once dotted the Irish landscape; many have been ploughed out, built over, or simply eroded into invisibility. This one at Gardenfield occupies a curious middle ground: partially absorbed into the working fabric of a property, partially intact, and almost entirely easy to miss.

The site forms a roughly circular area of about thirty metres in diameter, defined by a scarped, or cut and sloped, earthen edge rising to around one metre in height and spreading to two metres in width. According to the survey compiled by Denis Power and uploaded in August 2011, the scarp is best preserved along its eastern to south-eastern arc, where it borders a marshy area that has likely discouraged disturbance over the centuries. Along the south-east to south-west section, the scarp has been faced with stone and pressed into service as a property boundary, giving it a secondary life as a field wall. At the north-west, a garage now sits directly on the line of the original enclosure, and a shed occupies the south-west section, meaning that two sides of the rath have been interrupted by relatively modern outbuildings.

The site lies immediately south of a cottage, within what is described as a back garden under rough pasture, which means access would require the permission of the landowner. The most legible portion of the rath is the eastern to south-eastern edge, where the scarped bank survives in reasonable condition and the relationship between the earthwork and the adjacent marshy ground is still readable in the landscape. The stone-faced stretch to the south offers a different texture, where the boundary between archaeological feature and functional wall has blurred over time. Visitors with an interest in early medieval settlement patterns will find the site thought-provoking precisely because of its compromised state, the way a garage and a shed now stand where the enclosing bank once ran unbroken is, in its own way, as telling as the sections that survive.