The Purvanchal Range lies along the Eastern border of India with Myanmar. The formation of this range was in a similar manner as in case of Himalayas by the collision of Tectonic Plates. Some of the prominent features of the Range include steep slopes, conical peaks and deep valleys.
The Patkai Ranges itself includes three ranges the Patkai–Bum, the Garo-Khasi-Jaintia and the Lushai hills. The entire area is densely forested mainly consisting of Sandstones. The peaks in the range are not too high and neither is rugged. It is the Pangsau Pass that provides a perfect route to the range.