This article is about the Class III road numbered C100 maintained by DfI Roads.
For other roads numbered C100, see C100
The C100 is a Y shaped road in north Antrim. The road starts at two different points separated by about three and a half kilometres along the A2. At its eastern start point the road leaves the A2 at White Park Bay and climbs inland to reach a T junction, where the road off to the west forms the western leg of the C100 coming from the A2 at Lisnagunogue. After the two starter roads meet, the road heads south and soon crosses the B17 at a crossroads. Continuing south, the road becomes rather straight as it crosses the rural landscape. Eventually the road does come to an end on the B67 in the small village of Moss-Side.