National Route 6 (N6) is a 155-kilometer (96 mi) major primary national route that forms part of the Philippine highway network in the provinces of Negros Occidental and Negros Oriental.

It then regains the Bacolod South Road name shortly after crossing the Bago River.

It continues its course along the western coast of Negros Occidental up to Kabankalan, wherein from barangay Binicuil it is locally known as Guanzon Street.

In Kabankalan poblacion, the route turns southeast as Bais–Kabankalan Road, which is locally known in the city as Aquiles-Zayco Avenue, as Bacolod South Road continues from the junction as N712.

Traversing the mountain range of Negros Island, it then enters Negros Oriental at Mabinay, where the kilometer count changes because of the separate kilometer count among the two provinces.