Roads of this kind can be easy to overlook, partly because they tend to look like, well, roads. But an archaeologically classified trackway is something more specific: a route whose age, construction, or course sets it apart from a modern lane or farm track, and whose physical character suggests it belongs to an earlier period of movement across the landscape.

Ireland has a long tradition of such routes, ranging from the great medieval highways that connected provincial centres to the more intimate local paths that linked townlands, field systems, and seasonal grazing grounds. Some are built up with stone, others are simply worn into the ground by centuries of foot and hoof traffic. In boggy terrain, timber trackways were sometimes laid down to make passage possible, and a number of these have survived in remarkable condition beneath the peat. What category the Carheen example falls into, and how old it might be, remains unclear from what is currently available.