It is a togher, the Irish term for a trackway laid across wet or marshy ground, and this particular example at Corlea represents one of the quieter entries in a landscape already famous for its ancient timber roads.

The structure runs on a northeast to southwest alignment and measures roughly one and a half metres wide, with a depth of around twenty-six centimetres. It was built using longitudinal roundwood, that is, lengths of timber laid along the direction of travel rather than across it, combined with brushwood packed beneath or alongside to stabilise the surface. What makes this example worth pausing over is the presence of what appear to be stone toolmarks on the timber, a detail that, if confirmed, would offer a small but direct trace of the people who shaped and laid the wood. Corlea is already known for its remarkable Iron Age road, a massive oak trackway dated to 148 BC and now partially displayed at the Corlea Trackway Visitor Centre nearby, but the bog here contains multiple layers of human activity, and this class 3 togher is one of the less celebrated pieces of that longer story. Class 3 designates a specific construction type within the typology developed for Irish wetland roads, distinguishing it from the heavier oak plank roads or simpler brushwood paths found elsewhere in the same landscape.

The bog at Corlea has yielded an unusual concentration of these ancient trackways, each representing a separate act of crossing, a community's solution to terrain that was neither land nor water. The Visitor Centre offers access to the wider site and houses a section of the famous Iron Age road under climate-controlled conditions, which gives some sense of the scale and effort involved in laying timber roads across active bog.