This article is about the Class III road numbered C554 maintained by DfI Roads.
For other roads numbered C554, see C554
The C554 is one of Northern Ireland's longer C roads, with itself and its spurs totalling over 37km in length. The main portion of the route starts on the A505 near Mountfield and heads north east towards Greencastle, crossing the Owenreagh River on the way. At Greencastle, the road encounters the B46 at a crossroads. After the crossroads the road turns in a northerly direction. Soon one of the route's two spurs forks backwards and heads south east to meet the C612 on the edge of Formil Wood. The remainder of the route turns north east as it approaches Glenhull, after which it dips down into the glen to cross the Owenkillew River. The road meets the C612 on the other side of the glen and after a short multiplex, continues from a junction south east of here. The road regains higher ground and makes its way north east across the moor, crossing the C621 as it does so. A spur soon leads south, crossing the upper reaches of the Owenkillew on its way to rejoin the C612 at Dunnamore. Back on the moor, the road descends to the north east towards The Six Towns. The road finally comes to an end at Labby where it runs onto the B47 at a TOTSO.