The height of the mountain was 3,143 metres (10,312 ft) in 1909, but now the height of the mountain is 3,147.3 metres (10,326 ft). It is the highest mountain in the Indochinese Peninsula (comprising Vietnam, Laos, and Cambodia), hence its nickname "the Roof of Indochina". It is located in the Lào Cai Province of the Northwest region of Vietnam, 9 km (5.6 mi) southwest of Sa Pa in the Hoang Lien Son mountain range.