This is a togher, an ancient Irish bog road constructed by laying timber across waterlogged terrain to create a passable surface, and the one recorded here belongs to what archaeologists classify as a class 3 type, meaning it was built from scattered brushwood rather than the more elaborate split-plank engineering seen in higher-class examples.

The Corlea example runs on a north-east to south-west orientation and measures roughly 2.19 metres wide and 0.17 metres deep, modest dimensions that suggest a functional local crossing rather than a major routeway. The material used was predominantly hazel and birch, both fast-growing species well suited to coppicing and readily available in the kinds of scrubby woodland that would have bordered Irish bogs during prehistoric and early medieval times. Roundwood pieces appear occasionally throughout the brushwood, adding some structural reinforcement to what is otherwise a relatively simple construction. Corlea itself is already known to specialists as a significant site for bog road archaeology; a separate and far more elaborate Iron Age trackway from the same area, dated to around 148 BC, is now partially displayed in the Corlea Trackway Visitor Centre nearby. This smaller, less celebrated example is a quieter counterpart to that monument, less dramatic in its engineering but no less telling about the practical demands of moving through a landscape that was, for much of the year, largely impassable.