This is a togher, the Irish term for a bog road, constructed by laying roundwood and brushwood across soft or waterlogged ground to create a passable surface. The example recorded at Corlea runs in a northeast to southwest orientation, measures 1.35 metres wide and 0.22 metres deep, and is built predominantly from oak, hazel, and birch. Those dimensions make it a class 3 togher, a designation based on construction type and scale rather than age or importance.

Corlea is already known to archaeologists as the site of one of the most significant Iron Age trackways in Europe, and the bog here has proved exceptionally good at holding onto what people left behind. The practice of building toghers reflects how seriously early communities in Ireland had to contend with the landscape: raised bogs and fens covered enormous stretches of the midlands, and crossing them without a timber road could be genuinely hazardous. The choice of oak, hazel, and birch in this particular structure is consistent with what was locally available and workable, with oak providing durability underfoot and hazel and birch contributing lighter brushwood to fill and support the surface. The data behind this record was gathered by the Irish Archaeological Wetland Unit at University College Dublin, a project that systematically documented bog roads across the Irish midlands before many sites were lost to turf cutting.