GUNUNG · Vietnam

Gunung Phu Si Lung

Núi Pu Si Lung / Phu Xi Lùng (Phu Si Lung)

Information

Elevation: 3.076 m
Country: Vietnam (VN)
Location / Range: Mountain range on the Vietnam–China border, Lai Châu Province (northwestern Vietnam)
Mountain type: Non-volcanic mountain peak (metamorphic/granite rock) — Vietnam–China border
Volcanic?: No (non-volcanic)
Coordinates: 22.6333, 102.7833
Difficulty: Very difficult / extreme — a 100 km round-trip trek, a minimum of 4 days and 3 nights; a trail through dense forest, rivers, and bamboo; only for experienced hikers with a guide/escort
Best Season: November–April (dry season); May–October is humid with very slippery trails
Permits & Rules: A special border-zone permit is required from the Lai Chau Border Guard Headquarters (Hoang Van Thai, Lai Chau); the Lao Cai Military Staff Committee issues the permit letter. A local guide from Pa Vệ Sử or Sapa must accompany you — solo climbing is not permitted.
Hazards: Very remote terrain (100 km round trip), easy to get lost without a guide, steep and slippery trails, repeated river crossings, far from medical facilities, rapidly changing weather above 2,500 m

Description

Phu Si Lung (3,076 m), also called Pu Si Lung or Núi Phu Xi Lùng, is the second highest peak in Vietnam after Fansipan, situated right on the China–Vietnam border in Pa Vệ Sử commune, Mường Tè District, Lai Châu Province. Unlike Fansipan which is now accessible by cable car, Phu Si Lung is one of the most remote and demanding treks in Southeast Asia. The round trip covers around 100 km through dense primary forest, river crossings, and trails choked with bamboo and rhododendron — taking experienced hikers a minimum of 4 days and 3 nights. The mountain's border status makes government permits mandatory, and each group is accompanied by an assigned military escort throughout the journey. Due to the difficulty of access, Phu Si Lung is visited by only a handful of experienced adventurers each year, making it the most exclusive and remote summit in Vietnam.

Routes

Jalur Pa Vệ Sử — Satu-satunya Rute Resmi ke Puncak

Sangat sulit / Ekstrem — jalur hutan primer tanpa infrastruktur; wajib panduan & escort militer; hanya untuk pendaki berpengalaman

4 hari 3 malam minimum PP (~100 km pulang-pergi)

The only known official route to summit Phu Si Lung (3,076 m) starts from Pa Vệ Sử commune, Mường Tè District, Lai Châu Province. From this border village, hikers follow dirt roads into dense primary forest — the total round trip is approximately 100 km through highly varied terrain: rocky dirt tracks, river crossings, steep slopes, bamboo and rhododendron-choked sections, and segments with barely visible trails. The group must carry all sleeping gear, food, and water for the entire journey. An assigned military escort accompanies the group throughout, per local government regulations. The summit itself sits right on the China–Vietnam border line, offering panoramic views into both countries.

Route Segments

1

Pa Vệ Sử Trailhead → Camp 1 (hari pertama)

↔ 25 km ⏱ ~8–10 jam

Jalan tanah berbatu, beberapa sungai kecil; hutan lebat mulai masuk; jalur masih relatif jelas
2

Camp 1 → Camp 2 (hari kedua)

↔ 25 km ⏱ ~8–10 jam

Medan semakin berat; jalur masuk hutan primer; crossing sungai utama; kemungkinan bambu dan akar pohon besar
3

Camp 2 → Puncak Phu Si Lung (3.076 m) → Camp 2 (hari ketiga)

↔ 10 km ↑ 600 m ⏱ ~10–14 jam (summit push + turun ke camp) 3.076 mdpl

Bagian paling berat; jalur hampir tidak ada di beberapa titik; medan berbatu dan berlumut di dekat puncak
4

Camp 2 → Pa Vệ Sử (pulang)

↔ 50 km ⏱ 2 hari

Turun lebih cepat namun tetap melelahkan; crossing sungai bisa lebih berbahaya jika hujan

Source

Climbing Experiences

Phu Si Lung (3,076 m) is Vietnam's second highest mountain — and one of the most gruelling and remote treks in all of Southeast Asia. There is no cable car, no tourist infrastructure, no maintained trail. What awaits: a 100 km journey through dense primary forest, rocky river crossings, and bamboo thickets, taking a minimum of 4 days and 3 nights, with mandatory military permits and an escort from the local border authority. The sources below document real experiences of adventurers who have conquered one of Vietnam's most inaccessible summits. All links are verified live before display.

References

The summary above is compiled from the following sources. Click to explore them yourself.