Not a track worn into soft ground by habit or cattle, but a deliberate construction of gravel and stone, three metres wide and up to twenty centimetres thick, laid out with a clear direction of travel: from the north-east to the south-west. The peat that eventually swallowed it did what peat does well, preserving the structure in near-airless, acidic conditions that would have destroyed almost any comparable surface left exposed to the elements.

The road was first recorded in 1957 by the archaeologist Etienne Rynne, and excavated the following year along with a further extension of the same feature. Bog roads of this kind, sometimes called toghers, were a practical solution to the problem of crossing terrain that was otherwise impassable for much of the year. The Irish midlands are laced with raised bog, and ancient communities built causeways and trackways through them using timber, brushwood, or, as here, stone and gravel. What the Derryaroge road connected, and when it was built, the available record does not say; the excavation details passed into the collections of the National Museum of Ireland, where the site notes remain.