A togher is a trackway built across wet or marshy ground, typically constructed from timber, brushwood, or other organic materials laid down to allow passage through otherwise impassable terrain. Ireland's bogs have preserved many such routes for thousands of years, holding them in the anaerobic, acidic conditions that prevent decay. What makes this particular togher quietly notable is its classification as a class 3 example, a designation that places it within a typological system used to categorise the varying construction methods and complexity of these ancient wetland roads.

The trackway at Derryad was noted during field survey work carried out in 1988, with information attributed to B. Raftery, one of the foremost scholars of Irish bog roads and Iron Age archaeology. The Irish Archaeological Wetland Unit, based at University College Dublin, undertook systematic survey work across the Irish midlands during the late twentieth century, identifying and recording togher sites that had been largely invisible to earlier generations of researchers. The midlands boglands of counties like Longford, Roscommon, and Offaly contain an exceptional concentration of these features, many of which represent genuine feats of communal organisation, requiring the felling, shaping, and laying of substantial quantities of timber across difficult ground.