The road measures 6.13 miles long and would take a car obeying speed limits 8 minutes to travel its length.
The B4415 is a B Road and is located in the Zone 4 Highways Region.
The road passes through several towns, including PWLLHELI, Nanhoron, Rhydyclafdy, and Efailnewydd.
The road is located entirely within Gwynedd.