At Corlea, a section of ancient trackway, known in Irish as a togher, runs on a north-west to south-east axis through what would once have been waterlogged, treacherous ground. This particular example is around one and a half metres wide, built from large lengths of roundwood laid lengthways along the route, with occasional transverse timbers crossing beneath to provide stability, the whole structure functioning as a kind of floating platform across the mire.

Toghers like this one are among the more quietly remarkable survivals in Irish archaeology. Bogland, with its cold, acidic, oxygen-poor conditions, preserves organic material that would otherwise rot away within decades, meaning that timber laid down thousands of years ago can emerge looking almost freshly cut. Corlea is already well known for a much larger Iron Age road, dating to 148 BC, built from massive oak planks and excavated in the 1980s and early 1990s. This class 3 togher is a different structure, smaller in scale and simpler in construction, representing the kind of workaday wetland crossing that people built and used across the Irish midlands for centuries, threading paths through a landscape that was otherwise almost impassable.