It is a togher, a type of timber road laid across wet or marshy ground by communities who needed to move through a landscape that would otherwise swallow a person whole. This particular example is classed as a class 3 togher, a category that typically refers to a relatively simple construction, lacking the elaborate carpentry of the great prehistoric roads like the Corlea Trackway nearby, but no less deliberate for that.

The Annaghbeg togher was recorded during a field survey in 1988, and its orientation runs roughly north-northeast to south-southwest. The reference comes from the work of Barry Raftery, the archaeologist whose sustained study of Irish bog roads did more than perhaps any other single body of work to bring these submerged structures into wider scholarly attention. His 1990 publication placed this togher among a wider catalogue of such features identified across the Irish midlands, a region whose deep peat bogs have preserved organic material, including timber, for thousands of years in conditions that would otherwise see it rot away entirely. The precise age of the Annaghbeg togher is not recorded in available sources, but the broader tradition of togher construction in Ireland spans from the Neolithic period through to the early medieval era and beyond.