Tags: Mountain Pass.
The Hải Vân Pass (Vietnamese: Đèo Hải Vân ocean cloud pass) is an approximately 21 km long mountain pass on National Route 1A in Vietnam. It traverses a spur of the larger Annamite Range that juts into the South China Sea on the border of Đà Nẵng and Thừa Thiên–Huế Province near Bạch Mã National Park. Its name refers to the mists that rise from the sea reducing visibility.