The largest glacier in Uttarakhand is Gangotri Glacier.

The Gangotri Glacier (Sanskrit, Nepali and Hindi: Gangotri) is located in Uttarkashi district, Uttarakhand, India, bordering Tibet. This glacier is a primary source of the Ganges River, it is the largest glacier in the Himalayas. According to an estimate the amount of ice in it is more than 27 cubic kilometers.

The river Ganga originates from the Gangotri glacier it is  known as Bhagirathi. The name Ganga picks up later on after the river passes Devaprayag and merges into the river Alaknanda.

State: Uttarakhand
District: Uttarkashi
Famous for/as: Pilgrim
Languages: Hindi, Garhwali
Best Season: April to Jun, Sep to Nov
Weather: Summer 10 to 15°C,
Winter: 0 to 10°C
Altitude: 3415 m
Pincode: 249137
STD code: 01381