Extreme race lasts for 11 days and covers 671km of rugged, challenging territory.
10-part doc series, World’s Toughest Race: Eco-Challenge Fiji, is launching on Amazon Prime Video on Friday 14 August.
The series is hosted by Bear Grylls and follows an expedition race with 330 competitors in 66 teams of five, from 30 countries, racing non-stop for 11 days, 24 hours a day.
The race spans a total of 671km across Fijian mountains, jungles and oceans.
The production was filmed last autumn, and was produced by MGM Television in association with Amazon Studios.
Grylls is the host and executive producer Bear Grylls; showrunner and executive producer is Lisa Hennessy (Eco-Challenge, The Biggest Loser); executive producers include Mark Burnett (Survivor, The Voice) and Eric Van Wagenen (Survivor, The Amazing Race).