The road measures 5.95 miles long and would take a car obeying speed limits 11 minutes to travel its length.
The B5121 is a B Road and is located in the Zone 5 Highways Region.
This is a true long-distance route, journeying through numerous towns like Lixwm, Brynford, Greenfield, Bryn Celyn, and HOLYWELL.
The road connects Clwyd and Clwyd.