Watch Movies2Watch. The Yukon 1000; known as the toughest endurance and survival race in the world, Push Past Impossible tracks the stories of the incredible individuals who entered the 2023 event. Tracking the same path of the early frontiersmen and women during the Klondike gold rush in the late 1800s, the race draws 30 teams each year to compete in an unforgiving environment that is the last frontier on Earth.