This is a togher, the Irish term for a bog road or trackway, and the example recorded here is a remarkably precise piece of ancient engineering preserved by the very wetness that once made it necessary.

The trackway runs for twenty-two metres on a north-east to south-west alignment, and is roughly two and a half metres wide, enough for a person and perhaps a loaded animal to pass along with reasonable confidence. It was constructed from two types of material: up to eleven roundwoods, the trimmed trunks or major branches of felled trees, each between seven and nine centimetres in diameter, and fifteen thinner pieces of brushwood ranging from two to five centimetres across. All of it was laid longitudinally, meaning along the direction of travel rather than across it, which places this example in the category of a class 2 togher, distinguished by that particular method of construction. At least one wooden peg was also identified, likely used to pin the timbers in place and prevent the whole surface from shifting or floating as the bog moved beneath it. Toghers of this kind were built across Ireland from the Neolithic period onwards, and the anaerobic, waterlogged conditions of bogs are among the only environments capable of preserving organic material like wood over such timescales.