This ancient earthwork consists of a large circular enclosure measuring 60 metres in internal diameter, defended by an earthen bank that still stands between one and two metres high in places, particularly well preserved along its eastern section. The fortification’s defences originally included a fosse, or defensive ditch, running around the outside of the main bank, with traces of an outer bank beyond that, though this outermost feature has worn down considerably over the centuries.

The ringfort’s strategic positioning wasn’t chosen by chance; its elevated location on the ridge would have given its inhabitants clear sightlines across the good agricultural land below, providing both defensive advantages and oversight of farming activities. Archaeological surveys have revealed intriguing evidence of the site’s long history of occupation and use. Oliver Davies documented traces of an ancient field system near the ringfort, predating the current field boundaries that divide the landscape today, suggesting this area has been farmed and inhabited for many generations.

Like many of Ireland’s estimated 45,000 ringforts, this example at Finner likely dates from the early medieval period, roughly between 500 and 1200 AD, when such fortified farmsteads were the typical residences of prosperous farming families. These weren’t military fortresses but rather protected homesteads where extended families lived, worked, and stored their wealth in the form of cattle and agricultural produce. The substantial nature of this particular ringfort, with its multiple defensive features and commanding position, suggests it may have belonged to a family of some local importance in medieval Donegal society.