Forty-four toghers have been identified within Cooleeny townland alone. A togher is a timber trackway laid across boggy or waterlogged ground, a practical solution to a landscape that would otherwise have been impassable, and the concentration of them here suggests this was not a marginal or occasional route but a place people needed to cross, repeatedly, over generations.

A field survey carried out by Gowen in 1999 recorded the variety of construction methods used across the site. Most toghers combined brushwood, the cut stems and branches of shrubs and small trees, with roundwood, meaning slightly larger, roughly cylindrical timber. Six examples used roundwood alone, eight used brushwood only, and one unusually incorporated gravel alongside brushwood, suggesting the builders adapted their techniques to local materials and conditions. Wood identification carried out on seventeen of the toghers revealed a wide range of species: alder, ash, birch, blackthorn, hazel, mountain ash, and willow. These are largely the trees one would expect to find growing at the edges of a bog, which implies the builders were harvesting timber close to hand rather than transporting it from elsewhere. Two of the toghers have been directly dated by radiocarbon analysis, both returning Iron Age results: one to 388 to 207 BC, the other to 372 to 192 BC. These dates place the construction of at least part of the network in the later Iron Age, a period when Ireland's bogs were apparently busy with exactly this kind of engineered movement through difficult terrain.