The one at Toberpatrick in County Wicklow is something else. It is trivallate, meaning it is ringed by three concentric earthen banks rather than one, a degree of elaboration that signals either unusually high status or a settlement where the occupants felt a particular need for layered defence. Set on a gentle south-facing slope, the whole complex stretches roughly 80 metres from north-east to south-west, with the innermost enclosure measuring about 37.5 metres in diameter.

The engineering involved is considerable even by the standards of early medieval earthwork. The innermost bank reaches between one and 1.8 metres in height and up to 6.5 metres wide at its base. Beyond it lies a fosse, a defensive ditch running between three and five metres wide and up to 1.5 metres deep, crossed by a causeway 4.5 metres wide that aligns with a formal entrance gap in the innermost bank on the south-eastern side. A middle bank follows, then a flat open area between five and fifteen metres wide, and then a further outer bank beyond that. This sequence of bank, ditch, gap, bank, open ground, bank gives the site a studied, deliberate quality. Trivallate ringforts are rare enough across Ireland that their presence tends to mark them out as the enclosures of local lords or people of significant regional standing in the early medieval period, roughly the fifth to twelfth centuries. No internal features have been recorded within the innermost enclosure, though that absence likely reflects the limits of surface survey rather than any lack of original occupation.