It is a togher, a term for a timber trackway laid across wet or waterlogged ground, and it belongs to a class of monument that tends to startle people who encounter it for the first time. These were not roads in any modern sense, but carefully placed arrangements of split planks, branches, or brushwood, pressed into the surface of a bog to allow people and animals to cross ground that would otherwise swallow them. That one has been recorded here, classified as a class 2 togher, suggests a structure of some deliberate construction, likely involving longitudinal rails or transverse planks rather than simple brushwood bundling.

Toghers are among the more quietly remarkable survivals in the Irish archaeological record. The anaerobic conditions of a bog, airless and acidic, can preserve organic material for thousands of years, meaning that timber laid down in the Bronze Age, the Iron Age, or the early medieval period can still be physically present, compressed but coherent, beneath the peat. Ireland has produced some of the oldest wooden roads in Europe from exactly these conditions. The Killaderry togher has been formally recorded as an archaeological monument, which places it in the company of hundreds of similar features scattered across the Irish midlands and west, each one a faint outline of the routes people once found necessary enough to engineer.