Challenge-X obstacle races, mud run, and OCR information, distance, cost, dates, calendar, discounts, obstacles, reviews, and more

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Challenge-X is a registered charity and all profits from the 2013 event will go to help rehabilitate Royal Marines who have been wounded in Afghanistan

Challenge-X is a 100km two-day event consisting of three stages. A grueling 20km trail run followed by a punishing 65km technical mountain bike stage over the rough terrain of the breathtaking Dartmoor National Park on Saturday 10th August, then a demanding 15km circuit of the Royal Marines Commando Endurance Course at Woodbury Common, Devon on Sunday 11th August. Athletes will camp overnight on Dartmoor between stages.

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