Tough Mudder was launched in 2010 in New York by British expats Will Dean and Guy Livingstone who had to overcome their fair share of obstacles to put together the startup capital, which amounted to only $10,000 (£7.6k). The year after their first event in Pennsylvania in 2010 where 4,500 people joined in, the company had 14 events across America. These days the endurance events company, which has gone global, has an estimated yearly turnover of $110 million (£84.1m).

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