Andrea Hewitt, New Zealand. Age at the Olympics: 30
Andrew Hewitt ran away from the field at last year’s Beijing Grand Final, securing gold and the biggest win of her career thus far. Hewitt is dangerous because she’s such a smart racer—you often don’t notice her tucked in behind a pack of runners until she outsprints them to the line. She’s also shown that she’s a strength athlete capable of winning on brutal courses, which makes her adaptable to many of the various scenarios that can unfold at an Olympic Games.