Twenty-nine of these structures, known as toghers, were identified within Killoran townland during field survey. A togher is a bog road or trackway, typically built by laying timber across soft or flooded ground to allow people, animals, or goods to pass safely. What makes this concentration in Killoran particularly striking is the sheer number of them, and the variety of construction methods recorded across the group.

A 1999 survey by Gowen documented the full range of techniques used. Fifteen of the toghers were built from brushwood alone, with branches and small woody material bundled or laid to create a surface. The remaining examples combined brushwood with roundwood, the latter being trimmed timber of greater diameter, giving the road more structural depth. Three toghers showed evidence of pegs or stakes driven into the bog to hold materials in position. Wood species were identified in thirteen of the structures, and the range is revealing: alder, ash, birch, elm, hazel, holly, and mountain ash were all present, with ash and hazel appearing most frequently, likely because both were readily available and could be coppiced in quantity from surrounding woodland. A radiocarbon date obtained from one togher placed its construction somewhere between AD 1024 and 1162, placing it firmly in the early medieval period, when Irish bogs were being actively managed and crossed as part of organised agricultural and social life.