 Bhaba Pass connects the green and fertile Bhaba valley on the Kinnaur side with the Pin valley on the Spiti side.National Highway 22 runs alongside River Sutlej until Wangtu gives way to a narrow road leading to Katgaon and Kafnu.Katgaon and Kafnu are the base for one of the most beautiful trek routes in Himachal, the Bhaba trek.