A single townland, Cooleeny, yielded 44 toghers, the term used for timber roads laid across boggy or waterlogged ground, when field survey was carried out in the late 1990s. That density alone sets the place apart, suggesting that this stretch of bog was crossed repeatedly and purposefully over a long period, not by accident or in passing but as part of organised, repeated movement through difficult terrain.

A togher is essentially a corduroy road built from wood, laid down so that people, animals, or goods could be moved across ground that would otherwise be impassable. The Cooleeny examples were constructed using various combinations of brushwood and roundwood, the latter being small, trimmed timber poles. Six relied on roundwood alone, eight on brushwood alone, and one incorporated brushwood mixed with gravel, a less common approach. Where it was possible to identify the wood species used, the range was striking: alder, ash, birch, blackthorn, hazel, mountain ash, and willow all appear across seventeen of the toghers, pointing to builders who worked with whatever was locally available rather than selecting a single preferred timber. Two of the trackways have been radiocarbon dated, returning results of 388 to 207 BC and 372 to 192 BC respectively, placing their construction firmly in the Iron Age. That these dates cluster so closely suggests sustained activity in the area during that period, with communities investing real labour in maintaining access across the bog.