This article is about the Class III road numbered C191 maintained by DfI Roads.
For other roads numbered C191, see C191
The C191 totals 17km in length and is very long for a class III road, however this is as a result of the road consisting of two long spurs. The road starts on the A3 at Derryhaw and heads northwards past the C192 until eventually coming to the first spur which turns off to the north and into Killylea. In the village the road turns west to meet the A28 nearby. Back on the main route, the road turns north west into the small village of Tynan. From the village the second spur heads north west across the B210 from which it turns in more of a south west direction. Soon this spur of the road ends at the border with the road itself continuing towards the R185 near Glaslough, County Monaghan. Back in Tynan, the last part of the road heads north east and ends on the A28 slightly west of Killylea.