It is a togher, a type of ancient trackway built from timber and other organic material to carry people across the soft, unstable surface of a wetland, and this particular example belongs to what archaeologists classify as a class 3 type, one of several categories used to describe the varying construction methods found across Irish bogland. The fact that it runs east to west suggests it was part of a deliberate route rather than a casual crossing, connecting two points that mattered to the people who laid it down.

The togher was identified during field survey work carried out in 1988 and is referenced in Barry Raftery's 1990 study of Irish bog roads, which placed it at page 73 with an accompanying figure. Raftery's work was foundational in cataloguing the extraordinary range of wooden trackways preserved across Irish wetlands, environments where the acidic, oxygen-poor conditions of the bog slow decay and can hold timber in place for centuries or even millennia. The survey itself was part of a broader effort by the Irish Archaeological Wetland Unit, based at University College Dublin, to systematically record these fragile and often overlooked features before drainage, turf-cutting, or other land use disturbed them beyond recovery.

Class 3 toghers are generally simpler in construction than the more elaborate multi-layered roadways found elsewhere in Irish bogland, though the precise character of this one at Annaghbeg remains lightly documented. What the east-west orientation does offer is a quiet suggestion of connection, of people moving purposefully across a landscape that, to a modern eye, might seem to offer no passage at all.