Known as St Broghan's Road, it was a togher, a type of ancient trackway built from organic materials laid across wet or boggy ground to make passage possible where the ground would otherwise swallow a traveller whole. This particular example was constructed from brushwood packed with sand and gravel, and at just 0.3 metres wide it was barely broad enough for a single person on foot. By the early 1940s, parts of it were still visible at the surface, a faint trace of a path that had been buried for over a thousand years.

The togher has been dated to around 780 AD, give or take eighty years, which places it in the early medieval period when the Irish midlands were a landscape of monastic settlement, cattle routes, and seasonal movement across difficult terrain. It ran westwards from the vicinity of Clonsast graveyard, crossing the bog towards Derriss house in the townland of Raheenakearan. The association with St Broghan, a saint connected to this part of Offaly, suggests the road may have served a religious or ritual function, perhaps linking a burial ground with a settlement or another sacred site across the bog. Whether that connection is ancient or simply a later folk attribution is difficult to say with certainty.

Today there is little or nothing left to see. The combination of continued peat extraction and the passage of time has erased whatever surface traces remained after the 1940s. The road survives now mainly as a dated entry in the archaeological record, a brief set of measurements and references pointing to something that once crossed this landscape with quiet purpose.