Pha Din pass is 30 km with 1.680mm above the level sea. It had become a legend of Dien Bien Phu Victory. It was the small trails, and Viet Minh (the fathers and mothers of Viet Cong) made up of the small road to supply the weapons, food. It was the most challenging way to use human power to pull artillery from Som La Dien Bien Phu. It was the only main and shortest route to support Viet Minh to defeat the French in Dien Bien Phu during Indochina War.

Today's adventure is one of the most stunning ride of your cycling journey, and enjoy northern Vietnam's most incredible mountain landscapes. We cycle from the hotel, undulate a couple of km through tiny towns along the river before challenging the Pha Din legend Pass. There are 2 roads in between the middle part of the mountain top, and one is 13 km on a new road, and the old road is a well-maintenance smaller than the new one, similar distance without traffic at all. We challenge up about 13 km and enjoy cycling downhill 17 km.

Depends on your cycling skills and ability, you choose the route to challenge and enjoy one of the most beautiful and spectacular karst mountain passes in northern Vietnam. Afterwards, we enjoy riding downhill to the local market, Binh Thuan, our lunch break here. The afternoon' ride is beautiful as it's more leisurely than in the morning adventures. The ride takes us through Black Thai hill tribes, green valleys, and verdant fields of farm products. We will be back on the vehicle transfer to Son La city in the late afternoon.