The Mongol Derby is the longest and toughest horse race in the world.
The 1000km course recreates Chinggis Khaan's legendary empire-busting postal system. Riders changing horse every 40km, living with herders or camping under the stars.
Each year around 40 professional, semi-professional and enthusiastic amateur riders compete for the derby crown.
To stand a chance of finishing riders must balance survival skills and horsemanship. They must endure the elements, semi-wild horses as well as unfamiliar food and terrain. Completing the World's longest horse race is an achievement few can boast.