The road measures 19.89 miles long and would take a car obeying speed limits 31 minutes to travel its length.
The A4085 is a A Road and is located in the Zone 4 Highways Region.
This is a true long-distance route, journeying through numerous towns like CAERNARFON, Caeathro, Waunfawr, Betws Garmon, Rhyd Ddu, Beddgelert, Nantmor, Llanfrothen, and PENRHYNDEUDRAETH.
The road connects Gwynedd and Gwynedd.