World's Toughest Race: Eco-challenge (series)

Eco-Challenge is the ultimate expedition race in which international teams of adventure athletes race non-stop, 24 hours a day, across hundreds of miles of rugged terrain. Each team is comprised of four competitors and must include at least one member of the opposite sex. The race encompasses a variety of non-motorized forms of transportation, and teams will be required to use expedition problem-solving skills in their quest for the finish line of "The World's Toughest Race."