Fansipan Mountain is located 9km south-west of Sapa Townlet in the Hoang Lien Mountain Range. Fansipan is branded "the Roof of Indochina" at the height of 3,143m; Fansipan is to be approved as one of the very few eco-tourist spots of Vietnam, with about 2,024 floral varieties and 327 faunal species.
The topography of Fansipan is varied. Muong Hoa Valley, at the lowest altitude (950-1,000m), is created by a narrow strip of land at the base on the east side of the mountain.
Geologists say the Hoang Lien Mountain Range, with Fansipan as its highest peak, did not emerge in the mountainous North West of Vietnam until the neozoic period (circ. 100 million years ago). Fansipan, a rough pronunciation of the local name "Hua Xi Pan" means "the tottery giant rock".
It takes six or seven days to reach the 3,143m summit, the highest peak of the Indochina Peninsula. The summit of Fansipan is accessible all year round, but the best time to make the ascent is from mid-October to mid-November, and again in March.
Foreigners like best to book Fansipan tours between October and December, as this period is more often than not free from the heavy rains that obstruct the jaunt. But the Vietnamese prefer their tours to the peak of the mountain from February to April, as it is not so cold then. However, the best time for the trek to the mountain is from the end of February to the start of March, when the flowers all flourish and the climbers may behold the carpets of brilliant blossoms, violets and orchids, rhododendrons and aglaias.