The C455 starts on the A822 next to Crieff Bridge in the south of Crieff. It runs west through fields and patches of woodland to Strowan, where it briefly dips down to the river bank as it rounds the side of a hill. Turning away from the river once more, the road continues west to meet the B827 at Dalginross, Comrie. The road is more or less S2 throughout, and appears to be an ancient alternative to the A85 route on the north bank of the River Earn. Today it is a pleasant side road, which whilst slower than the main road, can be less frustrating, as it is rarely congested even at busy times.