Hoang Lien National Park

Wherever you stand around Sa Pa, one mountain range can never be seen whole.

It is the Hoàng Liên Sơn range. Its core lies inside Hoàng Liên National Park, a nature reserve of nearly 300 square kilometers. Vietnam founded the park in 2002. It was built on a reserve that had existed since the 1980s. The park stretches across Lào Cai and part of Lai Châu. Its slopes rise from a few hundred meters all the way to the summit of Fansipan. Fansipan is the highest mountain in the region, at roughly 3,143 meters.

On its own, 3,143 meters sounds abstract. There is a clearer way to feel it. The lowest point of the park sits only about 380 meters above sea level. From there to the top of Fansipan is an enormous change in altitude. That sudden change creates what scientists call a diversity of habitats. Within a single reserve, some places hold tropical evergreen forest, and others hold deciduous mountain forest. Higher still comes subalpine vegetation, where only sparse grass and scrub grow in a climate that stays cold all year.

That is why Hoàng Liên has been recognized as one of the ASEAN Heritage Parks. Scientists have recorded nearly 3,000 plant species in this vast forest. They have also recorded more than 555 species of vertebrate animals. Many of them are endemic, living here and nowhere else in the world. The Fujian cypress, the incense cedar and the Hoàng Liên fir may be unfamiliar names to city dwellers, but they are ancient trees, still standing in the forests of Hoàng Liên.

The most popular stop for visitors on a short trip is the area of Suối Vàng and Thác Tình Yêu. It lies about 14 kilometers from the center of Sa Pa, along National Route 4D. Thác Tình Yêu means Love Waterfall. The name is tied to a folk love story that people still pass on. It is a legend, not a historical event. Still, the legend gives the stream and the falls more meaning for the people who come to see them. From the paved road, a narrow path winds through primeval forest to a viewpoint over the stream and the falls. Before the falls come into view, the sound of falling water already carries through the trees.

Deeper inside the park is the Rừng già trail, the Old Forest trail. It runs more than 4 kilometers from the starting point at Trạm Tôn. Along it grow stands of ancient rhododendrons, tea groves, and trees recognized as heritage trees. In the right season, the rhododendrons bloom red in patches across the forest. They look like small fires lit against the dark green of the mountain.

Fansipan itself stands within Hoàng Liên National Park, and there are two very different ways to the top. The first is the commercial cable car run by Sun World, a line strung through cloud and mist from the Sa Pa side. The second is to go entirely on foot, along one of three trails inside the park. One starts from Trạm Tôn. The other two start from the villages of Sín Chải and Cát Cát. The Trạm Tôn trail is the shortest, about 10 and a half kilometers to the summit. It can be walked in a single day, or over two days and one night. The trails from Sín Chải and Cát Cát are longer, meant for trekkers with experience and stamina.

The terrain on these trails is complex. It is easy to lose the way, the weather changes without warning, and some stretches are dangerously steep. In country like this, a guide does more than keep walkers safe. A guide also helps them understand what they are passing through.

Whether a visit stops at Thác Tình Yêu or climbs all the way to Fansipan, Hoàng Liên is primeval forest, not an ornamental park. What stands here has stood here for thousands of years. A Fujian cypress can live for several hundred years. A clump of ancient rhododendrons seen today may have been flowering since before the town of Sa Pa existed.

Sa Pa and Hoàng Liên may be among the few places left in Vietnam where a person can still stand in the middle of the forest and not see a single roof. There are only clouds, mountains, and the sound of water running somewhere far below. And the range, as always, will not let anyone see it whole.