Participants cross a mud obstacle during the Wild Boar Dirt Run (Wild Sau Dirt Run) in Laaben, 50 kilometers (31 miles) west of Vienna, Austria October 22, 2011. Some one thousand competitors take part in the annual event, which consists of a cross country run followed by an assault course over a distance of either 10 or 20 kilometres ( 6.2 - 12.3 miles). REUTERS/Lisi Niesner
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