Lizzy Hawker

Hawker, a British polar scientist by training, won UTMB five times between 2005 and 2012, yet she was equally strong on flat roads: world 100km champion in 2006, a British 24-hour record, and back-to-back Spartathlon wins with a women's course record. Mountain, road, timed and point-to-point events all fell to her within a few years. She also set a record on the long trail from Everest base camp to Kathmandu.