From its junction with the N9 it enters County Wicklow almost immediately and southeast it crosses the N81 in the town of Baltinglass. It continues southeast through Kiltegan before crossing into County Carlow for a short distance where it passes through Hacketstown. Back in County Wicklow it crosses the Wicklow Way and enters the southern end of the Wicklow Mountains near Tinahely.
From Tinahely it heads northwest for to Aughrim, and then east along the valley of Aughrim River to Woodenbridge where it is joined by the R752. The final leg of its eastward route is through the valley of the River Avoca which takes it through Avoca and under (though not connecting to) the N11 before terminating in the centre of Arklow.