The Bali Pass Trek is a popular trekking route in the Uttarakhand region of India. It is a challenging trek that takes around 7-8 days to complete and covers a distance of approximately 70 kilometers. The trek starts from Sankri and passes through the villages of Taluka, Osla, and Ruinsara before reaching the Bali Pass. The trek then descends towards the Yamunotri Valley and ends at Yamunotri.