Ringfort (Rath), Ardara, Co. Donegal

Rising 3.5 metres above the surrounding landscape, this circular platform measures approximately 28 metres across, with steep sides that drop into a flat-bottomed defensive ditch varying between 2.8 and 5.5 metres in width. The fortification's original defences included both an inner bank crowning the platform and an outer earthen bank, though the latter now survives to just 0.7 metres in height. Whilst several gaps pierce the banks today, these appear to be later breaches rather than original entrances, and a modern field boundary has cut through the eastern section of the outer bank.

The fort occupies a strategic position on a low east-west ridge in the Owentocker river valley, surrounded by marshy land that would have provided additional natural defence. Archaeological testing carried out in 2006 ahead of housing development revealed interesting details about the surrounding landscape; the northern area contained deep peat deposits with preserved wooden remains and undulating bedrock outcrops, whilst the southern slopes closer to the fort consisted of silty clay over boulder clay, though no additional archaeological features were discovered during these investigations.

This type of ringfort, known in Irish as a 'rath', represents one of the most common archaeological monuments in Ireland, with thousands scattered across the countryside. These enclosed farmsteads typically date from the early medieval period, roughly 500 to 1200 AD, when they served as defended homesteads for prosperous farming families. The substantial earthworks at Ardara, with its multiple banks and ditches, suggest this was home to a family of considerable local importance, perhaps controlling the strategic river valley and the productive agricultural lands that surrounded it.