Dai Ninh Pass is not the highest area in the Phan Son and Phan Lam forests, but this is the peak of the National Highway 28B connecting the two provinces of Binh Thuan and Lam Dong. The starting point is Luong Son Town, Bac Binh district, and the final point is adjacent to Highway 20 in Ninh Gia commune, Duc Trong district (Lam Dong), with a length of nearly 70 km.