The Nanda Devi National Park or Nanda Devi Biosphere Reserve, established in 1982 is a national park situated around the peak of Nanda Devi in Chamoli Garhwal district of Uttarakhand, in northern India. The entire park lies at an elevation of more than 3,500 m above mean sea level.
The National Park was inscribed a World Heritage Site by UNESCO in 1988. It was later expanded and renamed as Nanda Devi and Valley of Flowers National Parks in 2005.
Within the National Park lies the Nanda Devi Sanctuary, a glacial basin surrounded by a ring of peaks between 6,000 metres and 7,500 m high, and drained by the Rishi Ganga through the Rishi Ganga Gorge, a steep almost impassable defile.
The National Park is embedded in the 2,236.74 km² sized Nanda Devi Biosphere Reserve, which, in turn, is encompassed in the 5,148.57 km² buffer zone around the Nanda Devi and Valley of Flowers National Parks UNESCO site.
The best time to visit Nanda Devi National Park is from May to October.