Running along the eastern side of the steep Glengowley River valley in the Knockmealdown Mountains, this route through Kildanoge townland follows what is traditionally identified as the Rian Bó Phádraig, meaning the Track of Patrick's Cow, an ancient routeway crossing the uplands of Tipperary and Waterford. Where it has been maintained, the road is metalled and 3.2 metres wide, raised and revetted on the downslope side to keep it stable against the hillside. Signposted as St. Declan's Road to Ardmore, it carries two saintly associations at once, invoking both Patrick and Declan, the latter being the early Christian bishop credited with bringing Christianity to the Déise before Patrick's mission. Further south, the surface deteriorates, the banks on either side grow lower, and the route narrows to something more honestly ancient as it climbs toward the county boundary, where it passes through a stone wall into Waterford.

In 1997, a portion of the trackway was excavated in Kildanoge townland on the eastern bank of the Glengalla River. What the excavation found was a linear U-shaped trench cut through a natural gravel bank, with the base lined with water-rolled pebbles laid down to form a rough travelling surface. The two parallel banks measured roughly half a metre high on the western side and somewhat less on the eastern. No datable material came from the dig, and the unabraded condition of the trench suggested to the excavators that the feature as it survives may be no older than the last century or so. The more likely interpretation, however, is that a more recent intervention was made along the line of a much earlier feature, one used and reworked across many generations. The physical form of the road, a deliberately engineered trench with a laid surface in difficult mountain terrain, implies a degree of purpose and organisation that goes well beyond casual use, whatever its precise age.

The section in Kildanoge is accessible where it functions as a forestry road, though the route grows rougher and less defined as it approaches the Tipperary and Waterford county boundary. The pass itself offers a clear sense of how the route works in the landscape, with the ground dropping west toward the glen and rising east, channelling movement through the mountains in a way that would have made practical sense in any century.