|Location Map ( geo)|
|Distance:||4.5 miles (7.2 km)|
|Meets:||A947, A947, B9170, B9170|
|Route outline (key)|
The C21S comprises a number of routes in Turriff, and also two routes to the south east of the town. Within Turriff, the route originally comprised Crown Street and Balmellie Street, each connecting with the A947, but when the main road was rerouted out of the town centre, its former route along Main Street and High Street was added to the C21S. The route then leaves town on Balmellie Road, and forks on the edge of the town. The mainline runs eastwards to meet the B9170 near Idoch, whilst a lengthy spur runs south east to meet the same B road near Mill of Colp.