The teams will navigate 50 miles of turbulent rivers, battle through a deadly stretch of whitewater rapids known as Hell's Gate and bushwhack through thick brush to reach the extraction point. Armed with their pack rafts, the Endurance athletes hit a mass of fallen trees in water so dangerous that one team member goes under, and the Military Team unknowingly takes a break in an area filled with bear. Across the valley, the Mountaineers have a different strategy.