Day 1 — Hanoi → Lai Châu → Lao Chải 1
Day 1 ends in Lai Châu, not at a hotel. Pusamcap cave is a limestone cavern above the Nậm Na river — a short walk from the road, cool and quiet, with the specific silence of karst geology that the granite of the Hoàng Liên range above it doesn't have. Lao Chải 1 is the H'Mông village where the night is spent: stone walls, a homestay dinner cooked over wood, and a view toward the mountain that starts the next morning.
Day 2 — Tà Lèng → Summit Putaleng 3,049m → Shelter
8–9 hrs trekking10km1300m up850m down
The motorbike taxi ride to the trailhead at 1,700m is itself a transition — from the valley road to the forest edge, in 30 minutes of steep mountain track. The trek from there gains 1,300m over roughly 10km to the summit, through primary cloud forest and open bamboo. The summit at 3,049m is reached in the afternoon — the light across the Hoàng Liên range at this hour is different from a dawn push. Descent back to the shelter takes around two hours, for a hot sturgeon-and-beef hotpot — not the plain chicken most trekking shelters serve, even this high up.
Day 3 — Shelter → Rhododendron Peak → Sì Thâu Chải → Hanoi
8–9 hrs trekking13km200m up1400m down
The descent follows the Sì Thâu Chải route, not the way up — this is a true traverse. The trail crosses Rhododendron Peak ridge at roughly 2,400m, where more than 30 rhododendron species grow, densest between late February and mid-April. The route ends in Sì Thâu Chải village, a Red Dao community most visitors never reach, where a traditional herbal bath closes out two days in the forest before the night bus back to Hanoi.