2-23 Sa Mu Pass
The pass of Sa Mu in the central province of Quang Tri is nearly 1,400 meters above sea level and very near the Vietnam-Laos border. It is a big challenge for drivers on the north-south route.
The pass is 19.8 km long, connecting the two communes of Huong Phung and Huong Viet in Huong Hoa district, Quang Tri province. It is winding and always covered by white clouds.