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... (more) 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.