|Location Map ( geo)|
|Distance:||6.8 miles (10.9 km)|
|Meets:||A96, B992, B992|
|Route outline (key)|
The C66S starts on the A96 at Newtongarry, and heads south, winding through the hills with a summit at around 300m below Wishach Hill. Turning south east, the route slowly loses height, before a steeper descent into Insch, where it follows Western Road to meet the B992 in the town centre. There is also a spur south along Charles Street, also reaching the B992.