This one, sitting on an east-facing slope in the rolling pasture of Rausakeera in County Mayo, carries a more particular designation: an ancient inauguration site, a place where kings or lords were formally invested with authority in a ceremony that predates any written record of the ritual itself.

The enclosure is substantial. A roughly circular area, approximately 39 metres north to south and 38 metres east to west, is bounded by an earthen bank still standing around 1.1 metres high, with an external fosse, or ditch, dropping to a depth of 1.5 metres. An outer bank, slightly lower at 0.8 metres, once reinforced the whole arrangement, though it has been partly levelled on the western side. The main entrance faces north-east, a causeway bridging the fosse at a width of 5.6 metres, with a narrower gap of around 2.7 metres opening on the west. Tucked into the north-east quadrant is a souterrain, an underground stone-lined passage of the kind often associated with early medieval settlement, though this one is recorded as inaccessible. The identification as an inauguration site comes from the historian H. T. Knox, writing in 1908, who documented such places across the region at a time when local memory and surviving topography could still be read together.

Inauguration sites of this kind were the ceremonial stages of Gaelic political life. The act of kingship in early Ireland was bound to specific landscape features, and the choice of an elevated, east-facing position with a formal causeway entrance suggests a space designed for procession and public witness rather than everyday habitation. The earthworks at Ratheenagooagh are visible in the pasture, and the scale of the surviving banks, even where damaged, gives a clear sense of the original enclosure.