Tsaatan Tribe Expedition - Lake Khuvsgul Mongolia 

Known as the Blue Pearl of the Mongolia, lake Khuvsgul (over 200km in length!) is located in the northwest of Mongolia.
This tour includes visiting the Tsaatan tribe, the only tribe left in the world still riding on reindeers and experience how they live and actually survive in one of the world’s harshest winter conditions. The tribe lives in extreme remoteness, only reachable in a shorter time because we can cross the frozen lake - otherwise it would take days only to get there.
This expedition is designed for true explorers who have already seen everything else.
More info:
nomadicoffroad.mn/tsaatanexpedition