It is a togher, the Irish term for a trackway laid across soft or marshy ground, constructed from wood and organic material that would have rotted away centuries ago on dry land but survives here because of the anaerobic conditions that bog environments create. This particular example is classified as a class 3 togher, a designation that refers to its method of construction, typically a simpler form of laid timber or brushwood compared to the more elaborate jointed or planked trackways found elsewhere in Irish wetlands.

The trackway was recorded during a field survey in 1988 and found to run on a north to south orientation. It appears in Barry Raftery's 1990 publication, which brought together evidence for prehistoric and early historic road-building across Ireland's midland bogs. Raftery's work highlighted just how systematically people once engineered routes through terrain that might otherwise seem impassable, and Annaghbeg fits into that broader pattern of deliberate movement across a landscape that was, for much of the year, saturated and difficult. The survey work that identified this togher was carried out by the Irish Archaeological Wetland Unit, based at University College Dublin, which spent years systematically recording bog trackways before large-scale peat extraction could destroy them.