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Running is an inexpensive, convenient and increasingly popular sport, but some take it to the limit. From cold weather running in Alaska to the intense heat of the Sahara Marathon, a number of athletes choose to pit themselves against the elements. Extremes of environment, route and geography are another challenge, from trails through dense jungle to soaring mountain ranges. The rewards are the experiences of a lifetime, the sense of having been to largely unexplored places and the realisation of unique ambitions. Never before has there been a manual to pull together all the elements of this new, but fast growing sport. The book features over 150 stunning images and amusing, informative text.