It is a togher, the Irish term for a bog road, and this one is not a modest affair of bundled branches thrown across a wet patch of ground. It was an engineered structure, built with mortised oak planks laid transversely, fixed down with roundwood pegs, and underpinned by a prepared substructure of brushwood and wood chips arranged in three rough longitudinal lines. The recorded stretch runs to 657 metres, and the trackway was clearly visible extending beyond both surveyed ends.

The togher at Mayne came to light in 2005 and was excavated the following September. Investigators found it running on a WNW-ESE orientation across industrial peatland, connecting the Inny River to the west with higher bog ground to the east. The oak planks themselves were substantial, reaching up to 4.4 metres in length, and the quality of the joinery, mortised timbers pegged in place rather than simply stacked or woven, places this firmly in what archaeologists classify as a Class 1 togher, the most elaborately constructed category of bog road. Radiocarbon dating of the superstructure returned a date of 1200 to 820 BC, placing its construction somewhere in the later Bronze Age. Forty-three separate sightings of the trackway in drainage ditches were recorded across the site, giving some sense of how continuously it ran. A second trackway was subsequently identified immediately to its east, suggesting this corridor across the bog carried enough traffic, or enough importance, to warrant more than one route.