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Along Onsen

Along (Aalo), Arunachal Pradesh, India
Along Onsen
Location
Along (Aalo), Arunachal Pradesh, India
Water type
sulfurous
Temperature
42 °C
pH
6.5

Water profile

Thermicity
Sedative
42 °C
LowHigh

Relaxing — deep, immediate muscle release.

Mineralisation
Bio-active
LowHigh

Rich in active gases or metals — a strong mineral character.

Buoyancy
Standard buoyancy
LowHigh

Soft water — natural, classic buoyancy.

SoufreSulfuresSulfates

Along Onsen — named for Aalo, the headquarters of West Siang district in Arunachal Pradesh — serves a community on the banks of the Siang River, the upper course of the Brahmaputra as it descends from the Tibetan plateau through the deepest gorges on Earth before emerging into the Assam plain as the mighty river whose waters drain one of Asia's most geologically and ecologically dynamic watersheds. The West Siang district is home to the Adi people, one of Arunachal's most numerous indigenous communities, whose traditional animist religion (Donyi-Polo, Sun and Moon worship), intricate cane and bamboo crafts, and distinctive shawls represent a cultural tradition maintained with considerable vitality despite the rapid changes brought by road connectivity and educational access in recent decades. The bicarbonate thermal springs, rising through the intensely folded geology of the Eastern Himalayan syntaxis where the Siang River gorge creates the deepest river canyon on Earth, provide mineral bathing in a river town whose position above one of geology's most dramatic features gives the simple act of thermal bathing an extraordinary geological context.

Insider tip — Along, officially renamed Aalo, lies along the Sipu and Yomgo rivers in West Siang district amid towering Himalayan ridges. The hot springs here bubble at roughly 42°C and are used by the Adi community for traditional healing. The surrounding terrain is some of Arunachal's most dramatic, with deep gorges carved by glacial meltwater.
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Frequently asked questions

How hot is the water?
The water runs quite hot here, around 42 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features sulfurous water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.