Rajjat Yatra is celebrated after how many years gap in Uttaraakhand ........

Explanation:

The three-week-long Nanda Devi Raj Jat is a pilgrimage and festival of Uttarakhand in India. People from the entire Garhwal division-Kumaon division as well as other parts of India and the world participate in Nanda Devi Raj Jat yatraThe goddess Nanda Devi is worshipped at dozens of places in kumaon and Garhwal, but the region around Mt. Nanda Devi and its sanctuary, which falls in the Pithoragarh district, Almora district and Chamoli district, is the prime area related to Nanda Devi. In Chamoli, Nanda Devi Raj Jaat is organized once in 12 years. The Jaat (meaning Yatra or pilgrimage) starts from kansuwa village near Karnprayag and goes up to the heights of Roopkund and Homekund with a four horned sheep. After the havan - yagna is over, the sheep is freed with decorated ornaments, food and clothings, and the other offerings are discarded.