It is classified as a togher, a type of wooden trackway laid across wet or waterlogged ground to allow passage through terrain that would otherwise have been impassable. These structures were built by laying timbers, brushwood, or planks directly onto the bog surface, and they survive precisely because the anaerobic, waterlogged conditions that made them necessary in the first place also prevented the wood from decaying. The Annaghbeg example is a class 3 togher, a designation relating to its construction method and complexity within a broader typology of Irish bog roads.

The trackway was recorded during a field survey in 1988 and runs on a northeast to southwest orientation. It was noted by Barry Raftery, whose 1990 publication on Irish bog roads documented it alongside many similar structures across the Irish midlands. The survey work was carried out as part of a wider effort to catalogue wetland archaeological sites before drainage, peat extraction, or agricultural improvement could destroy them, a concern that gave urgency to fieldwork across boggy counties like Longford throughout the latter decades of the twentieth century. The precise age of the Annaghbeg togher is not recorded in the available documentation, but Irish bog trackways range in date from the Neolithic period through to the early medieval era, and many have yielded dendrochronological or radiocarbon dates that place them firmly in prehistory.