This article is about the Class III road numbered C187 maintained by DfI Roads. For other roads numbered C187, see C187.
The C187 on the whole forms a Y shaped route across the fields to the north west of Armagh. The road starts on the B115 just outside Armagh and heads north through the countryside before reaching a T junction. The C187 continues both left and right from this junction with the road left heading west to meet the C184 and the road right turning north to meet the B128 between Blackwatertown and the A29 junction.