The Yukon Arc­tic Ultra is not a well-known race — partly because it’s only been run­ning since 2004. And partly bea­cuse only a few peo­ple have ever com­peted in it, let alone fin­ished it. When asked what the most dif­fi­cult race is, most reply “oh the Marathon des Sables of course”. Now this has all changed because those who have heard of it, would agree with what the Yukon’s organ­is­ers describe as “The tough­est and cold­est race inthe world”. So what is it that’s so tough?