Assuming that you will be taking the Simikot route via Nepalgunj, there is quite a lot of walking to be done beginning from Simikot through Dharapori, Kermi, Yalbang, Tumkot, Yari, and the Tibetan border towns of Hilsa and Purang. This route is usually more for an adventurous traveler rather than for a religious one. If you take the overland route via Kyirong or fly to Lhasa and drive onwards, then there is not quite much of walking. Although the walking distance is not large, the walking hours are long due to the undulating paths during the Kailash Kora. The second day is by far the hardest day as you will be walking for 10 to 12 hours. The first day of walking is about 4 to 5 hours while on the third day you need to walk for about 2 to 3 hours.