It is a togher, a type of timber trackway built across wet or marshy ground, in this case classified as a class 3 construction, meaning it was laid using relatively simple materials and techniques compared to the more elaborate multi-layered examples found elsewhere in Irish bogs. The togher runs on an east to west orientation, a detail that carries quiet significance: many such routes were not casual paths but purposeful crossings, connecting drier ground on either side of terrain that would otherwise have been impassable.

The Annaghbeg togher was recorded during a field survey in 1988, with details published by Raftery in 1990. Bog trackways of this kind were constructed throughout prehistoric and early medieval Ireland, when movement across the midland wetlands demanded engineering solutions rather than simply the will to travel. Timber, often split oak or brushwood depending on the class of construction, was laid into the bog surface to distribute weight and prevent travellers or livestock from sinking. The preserving qualities of bog environments, low in oxygen and high in acidity, mean that organic materials which would rot away in ordinary soil can survive for centuries or even millennia. That a road intended perhaps for a single community, in a single wet season, is still detectable in the landscape more than a thousand years later is one of the quieter curiosities of Irish archaeology.