This is a togher, the Irish term for a trackway built across bogland, and the example at Corlea is one of the more modest kinds: a class 3 togher, constructed not from heavy split timbers but from longitudinal twigs and small brushwood laid in a strip roughly half a metre to just under a metre wide, oriented northeast to southwest across the wet ground.

The trackway first came to light when peat milling operations exposed a stretch of it at the field surface, running immediately west of a drain. That exposed section measured 5.7 metres in length and 0.8 metres across. What made the find more significant was what lay beyond the visible portion: the structure appeared to continue beneath the rising bog surface, extending towards the centre of the field rather than stopping at the drain. Subsequent excavation confirmed this, uncovering the brushwood band intact beneath the peat. Corlea itself is well known in Irish archaeology as the site of a remarkable Iron Age plank road discovered nearby, but the bog has preserved more than one generation of crossing, and this simpler, smaller trackway represents the kind of everyday solution to boggy terrain that was repeated across Ireland for centuries, its materials modest but its purpose the same.