Kim Boi Hot Springs
Mineral springs in Hoa Binh developed as a spa since the 1960s, and Hanoi's nearest thermal water.
Updated 14 October 2026
The springs at Kim Boi in Hoa Binh rise at around thirty-four to thirty-six degrees, mineralised and reported as drinkable, and they were developed from the 1960s into a sanatorium and rest complex - the model of the period, medical rather than leisure - which has since been joined by newer resorts along the valley. It is the nearest thermal water to Hanoi, which is what fills it at weekends. The surrounding district is Muong country with stilt house villages and terraced fields, and it sits on the road between Hanoi and Mai Chau, so it works as a stop on that route.
Highlights
- Water at thirty-four to thirty-six degrees - mineralised and reported drinkable.
- A sanatorium developed from the 1960s - the medical model of the period.
- Newer resorts along the valley - added since.
- Muong villages around - stilt houses and terraces.
When to go
October to April, when the water is most welcome. Half a day.
Before you go
The water is warm rather than hot. Older facilities are dated and the newer ones are commercial resorts. It is crowded at weekends with Hanoi visitors. Prices vary widely between operators.
Nearby
Mai Chau is west; Hoa Binh lake is north-west.
What to pack for Kim Boi Hot Springs
Chosen from what this place is for. Tap a kit for the full checklist.
- Swimwear - Needed at most public thermal pools; some traditional baths are nude and single-sex. Find on Amazon
- Quick-dry towel + flip-flops - For wet changing areas and hot poolside stone. Find on Amazon
- A dry bag or waterproof pouch - Somewhere safe for phone and valuables while you soak. Find on Amazon
- Water to drink - Hot soaking is dehydrating; sip between dips. Find on Amazon
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Opening times, ticket prices and seasonal closures change - check the official source before you go: official site.
