This article is about the Class III road numbered C558 maintained by DfI Roads.
For other roads numbered C558, see C558
The C558 is another rather lengthy route in south County Londonderry. The road starts on the B18 on the edge of Ballyronan on the north western shores of Lough Neagh. The road heads north and is very straight for its first few kilometres. The road crosses the C560 and meets the A6 outside Castledawson. After crossing the A6, the road continues into the village along Station Road and soon meets the A54. The road then follows Curran Road north west out of the village back towards the A6. The road continues on the other side of the A6 initially heading south west before very soon TOTSOing north west towards Curran, where it crosses the C550. Beyond here the road gradually turns more to the west as it finally meets the B42 outside Tobermore.