The Explorers Series: Casey Brown

Mountain biker Casey Brown is already one of the fastest mountain bike racers in the world. But because ripping down mountains at 50 miles per hour isn t quite thrilling enough for her, she s now into freeriding, an extreme discipline that essentially involves riding down the sides of massive cliffs, sending huge air along the way. It s the sport s version of bigwave surfing, and typically only attracts male riders with huge risk tolerances. Until Brown came along.