Truck racers show their mettle off-road

Water splashes, dust blows, and heavy wheels bounce over the dirt and rocks along the Juma River in Laishui county, Hebei province. This is the fourth leg of the 2013 Shaanqi Cup China Super Truck Race.

Zhang Lanxiang is the only female racer this year, the race's 11th annual event. She heard about the competition from friends in 2012 and was eager to participate.

When she first rode on a super truck, she was shocked by the size of the machine, and the loud roar of the engine.