Gorichen peak or Gori Chen Mountain is about 164 kms from the township of Tawang and is the highest peak of Arunachal Pradesh. It is also known as Sa-Nga-Phu, which means the Kingdom of Deity. Trekking and Mountain-climbing expeditions are usually undertaken in the months of April, May, September and October. Nearest airport is in Tezpur, Assam and is about 450 kms away. Visitors to Arunachal Pradesh need government permits.