The area has been virtually closed for decades. Barring a few exceptions, such as army or IMF sponsored expeditions, nobody is allowed to climb or explore Nanda Devi, purportedly for environmental reasons.

Is it allowed to climb Nanda Devi?

The mountain (Main Summit) is currently closed to all visitors. To climb any peaks in the Sanctuary, you must get permission from the Mountaineering Foundation in India. There are fees based on the height of the mountain you wish to climb, and a government liasion must be on your team.

Why can you not climb Nanda Devi?

Dehradun: The Nanda Devi East peak, with an altitude of 7434 meters, is considered by many mountaineers as one of the most difficult peaks to summit in the Indian Himalayas due to its tough terrain and technical challenges it throws to those attempting to scale it.