This is one of the most spectacular treks in the region that takes one from the lush green Parvati valley in Kullu to the stark and barren Pin valley in Spiti. On the way is the high-altitude Maltalai lake and the Pin Parvati Pass.

The trek's route borders the Pin Valley National Park, known for sighting of the elusive snow leopards and the Great Himalayan National Park that is famous for sightings of rare Himalayan birds like the Western Tragopan.