A field survey identified 44 toghers, or bog roads, within Cooleeny townland alone. A togher is essentially a causeway laid across soft or waterlogged ground, built from timber and other materials to allow people and animals to cross terrain that would otherwise be impassable. Finding one is notable; finding 44 in a single townland suggests that this bogland was not a barrier to movement but a regularly crossed and carefully managed landscape.

The construction methods varied considerably across the cluster. Most of the toghers combined brushwood, the smaller branches and stems of woody plants, with roundwood, which refers to timber used more or less as it came from the tree rather than being sawn or hewn. Six were built from roundwood alone, eight from brushwood alone, and one incorporated brushwood and gravel, an unusually composite approach. Where wood species could be identified, the range was broad: alder, ash, birch, blackthorn, hazel, mountain ash, and willow all appear, suggesting builders were drawing on whatever was locally and seasonally available rather than working to a fixed template. Two of the toghers have been radiocarbon dated, both falling within the Iron Age. One returned dates of 388 to 207 BC, the other 372 to 192 BC, placing their construction somewhere in the last few centuries before the common era, during a period when Ireland's bogs were actively being crossed and exploited by communities that left few other obvious traces in the landscape.