Bori Boot Festival holds an essential aspect of socio-cultural life of the people of Arunachal Pradesh. This festival of Arunachal Pradesh reflects the real culture and tradition of the people of the state. The Bori Boot Festival is one of the major traditional festival which is exclusively celebrated by the Hill-Miris tribe of Arunachal Pradesh. Hill-Miris tribe of Upper Subansiri District celebrates a number of festivals at different period of the year. Bori Boot Festival means to get together irrespective of age, sex and caste to hail the spring and successful harvest.

Bori Boot Festival also invokes the spirit of Bori Boot to bless the cultivators of the Hill-Miri Tribes with prosperity and free from diseases of any kind. The Hill-Miris tribal society celebrates this festival on a community basis from 6th to 8th of February of every year. This festival occurred in three consecutive days.

The Hill-Miris Tribal society as one of the major section of Donipolo and their common ancestry is being called from Abotani. The Abotani is considered to be the great grandson of "Sichi", the Mother Earth. He is believed to born in purely human form with all supernatural qualities peculiar to those ages. Almost all aspects of Hill-Miris beliefs and activities, faith originate from various activities in the life of Abotani.

During Bori Boot Festival, everyone in the Hill Miri Tribe plays with meek and mildness. It symbolizes the sign of purification and festivity. 'Etting' is co-piously applied on one and all. The elder's members of Hill-Miris have organized all the functions of this festival. The young members do all the work under the elder's guidance. The "Nibu" or the priest performs the Puja as well as conduct animal sacrifice. This puja is called "Bori Puja" (Bori-Wee). Every behaviour in this festival has its specific meaning. In this festival, affluent individual families or villagers perform all the sacred works and most important rituals.

Every social tribal community of Arunachal Pradesh celebrates Bori Boot Festival The festival of Bori Boot is generally covered the agricultural, religious and socio-cultural indentity of the people of Arunachal Pradesh. This gives them plentiful opportunity to enjoy and entertain freely.