Dawn Hamlin

Set a Guinness World Record for the shortest number of days to complete marathon on all seven continents. Dawn's marathon schedule for her world record attempt was Dubai (18-Jan), Marrakech, Morocco (27-Jan), Orlando, Florida (2-Feb), New Zealand Buller Marahon (9-Feb), Valencia, Spain (17-Feb), Trinidad & Tobago (24-Feb) and Antarctica Marathon (King George Island) (5-March). Dawn, aged 28, completed three ultramarathons in 2007, including a 50-mile trail run, as well as previously finishing the Great Wall of China Marathon and Kilimanjaro Marathon. If she finishes, the North Pole Marathon will represent her Grand Slam of global marathons.