Lamkhaga pass trek is a fairly remote trek and is now regarded as the classic route from Chitkul to Gangotri, which was first crossed by Marco Pallis in 1933. The trek is also known as Chitkul village to Gangotri trek or Harsil to Chitkul trek. It can be done from either side.

The beautiful route takes you through some of the most remote areas of Uttarakhand and Himachal Pradesh, like the Jalandhari valley that is covered with flowers post-monsoon. The snow in the early season could impede your progress.

Harsil is famous for Wilson’s Cottage built-in 1864. Gangotri is a short drive from Harsil, while Chitkul is the last village in the Baspa valley Though the difficulty is a relative term, the Lamkhaga pass trek is considered the most difficult in Kinnaur-Garhwal Himalayas. Lamkhaga pass trek offers a diverse landscape that includes Ranikanda meadows, boulder-strewn terrain, Baspa glacier zone, Baspa Glacier Snout and Meadows, and small glacial lakes of Kyarkoti in Harsil valley.

Auden’s Col is a pass connecting Rudugaira valley and Bhilangna valley, named after John Bicknell Auden, a British Geographical Survey officer, who first discovered it in 1935 and crossed it in 1939.

The pass is at 5490 m altitude and connects the ridge coming from Gangotri III (6580 m) peak on the north-west and the ridge coming from Jogin I (6465 m) on the east, and also binds a glacier coming from Jogin I, on the north side of Rudugaira valley, Auden’s Col & infamous Khatling glacier on the south side of Bhilangna valley.