The road starts at the B3TOTSO to the west of Keady and heads south, running alongside Lough Clea for over half a mile before climbing into the hills. At one point the road has been diverted slightly to the west as the original line (still extant but now unclassified) is steeper.
The road crosses the brow of the ridge and descends. It goes through a wood before continuing across the fields. The road soon reaches the border, where it ends. Ahead is the R181.