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Bach Moc Luong Tu

The fourth highest peak in Vietnam, climbed for a ridge that stands above cloud on the right mornings.

Updated 30 August 2026

WhereLao Cai and Lai Chau Provinces
Nearest citySang Ma Sao about 15 km; Sapa about 60 km
Best seasonOctober to April
Time to allowTwo days
Getting thereTrailheads at Sang Ma Sao in Bat Xat or from the Lai Chau side; guides and porters required
EntryGuide and permit fees

Bach Moc Luong Tu, also called Ky Quan San, rises to 3,046 metres on the boundary between Lao Cai and Lai Chau and is the fourth highest mountain in Vietnam. It is climbed over two days with a camp partway, and what makes it one of the more sought-after climbs is the ridge near the summit: on clear cold mornings the valleys below fill with cloud and the ridge stands out of it, with Fansipan visible across the gap. The route passes through bamboo, old forest and grass ridges. Guides and porters are required and arranged through the villages at the foot.

The landscape

  • The fourth highest peak in Vietnam - 3,046 metres on the provincial line.
  • A ridge above cloud - on clear cold mornings.
  • Fansipan across the gap - visible from the top.
  • Bamboo, forest and grass ridge - the route through them.

When to go

October to April, when the cloud seas are most likely. Two days.

What to expect

Guides and porters are required and are not optional in practice. The trail is steep and long. It is cold and wet at the camp. The cloud sea is not reliable and many mornings produce nothing.

Nearby

Y Ty is north; Sapa and Fansipan are south.

Key facts

Local nameKy Quan San (Vietnamese)
Location22.5117° N, 103.6525° E · map

Source: Wikidata, item Q31631548, read on 18 October 2026.

What to pack for Bach Moc Luong Tu

Chosen from what this place is for. Tap a kit for the full checklist.

  • Broken-in walking shoes or boots - Grip and ankle support matter more than looks; never hike in brand-new boots. Find on Amazon
  • Layers for big temperature swings - Warm sun by day, near-freezing at night, even near the equator. Find on Amazon
  • Layers + a waterproof shell - Mountain weather turns fast; a packable rain jacket saves the day. Find on Amazon
  • Extra-strong sun protection - Thin air means fierce UV; hat, sunglasses and high-SPF sunscreen. Find on Amazon

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