This pass is located on the R321 trunk route between Villeirsdorp and Grabouw in the Overberg region. It was named after Dr Antonie Viljoen who founded the area's famous apple industry in 1902. It is a well-designed modern pass with a good accident track record, notwithstanding the extreme hairpin bend on the northern side of the pass. The pass was originally built to a different line in 1860.
