This article is about the Class III road numbered C106 maintained by DfI Roads. For other roads numbered C106, see C106.
The C106 is a lengthy road which diagonally intersects the Antrim Hills. It starts at a junction on the A2 north of its viaduct across the Glendun River near Cushendun, heading west to join the main Glendun Road which passes under the A2 at the viaduct. Heading west and away from the coast, the road follows the natural passage into the hills formed by Glendun until eventually coming across open moorland. Here the road meets the C81 and assumes a brief multiplex across the bridge over the upper Glendun River, soon after which the road turns off to the south. The road follows the eastern edge of Slieveanorra Forest for several kilometres as it continues its journey across the upland landscape. Eventually the River Bush is crossed and after a sharp right turn, the lowlands to the south and west come into view. After a junction the road once again heads south, following a fairly straight line as it descends out of the hills. The road comes to an end once it reaches low ground on the B64 in Newtown Crommelin.