|Location Map ( geo)|
|Distance:||2.9 miles (4.7 km)|
|Route outline (key)|
The C123C starts on the C121C at Rothens and heads north west, following the River Don upstream through Tilliefoure Forest. Between Westhaugh and Glenton, the road crosses two side streams, and at the second bridge it crosses the old district council boundary, becoming the C123M.