Na Hang Lake
A reservoir among limestone towers in Tuyen Quang, in the forest where a snub-nosed monkey survives.
Updated 30 August 2026
The Na Hang reservoir was created by the Tuyen Quang hydroelectric dam in the 2000s, flooding the valleys of the Gam and Nang rivers between limestone hills, and the result is a long lake winding between karst towers with forest on the slopes above it - the comparison with Ha Long is made locally and is about form rather than geology. Boats run from Na Hang town to the Khuoi Nhi and Mo waterfalls and up the Nang river towards Ba Be. The surrounding Na Hang-Lam Binh reserve holds one of the few remaining populations of the Tonkin snub-nosed monkey, a species down to a few hundred animals.
The landscape
- A reservoir between karst towers - flooded in the 2000s.
- Waterfalls reached by boat - Khuoi Nhi and Mo among them.
- A route up the Nang towards Ba Be - the connection north.
- Tonkin snub-nosed monkeys - a few hundred left worldwide.
When to go
September to November and March to May. Two days.
Things to know
The monkeys are critically endangered, hard to find and not a reliable sighting. Boat trips are negotiated and take most of a day. Water levels vary with the dam. Facilities in Na Hang are basic.
Nearby
Ba Be lake is north over the provincial line; Tuyen Quang is south.
What to pack for Na Hang Lake
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 + a waterproof shell - Mountain weather turns fast; a packable rain jacket saves the day. Find on Amazon
- Daypack with rain cover - 20-30 litres holds water, snacks, layers and a first-aid kit. Find on Amazon
- Offline maps + a power bank - Download the trail before you lose signal; carry backup charge. Find on Amazon
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Opening times, ticket prices and seasonal closures change - check the official source before you go: official site.
