Aka International 10km run located in Ethiopia’s capital, Addis Ababa, the Great Ethiopian Run is Africa’s biggest and most famous running events—over 44,000 runners participated last year. If you’re worried a 10k won’t be a big enough challenge, fear not—the entire city of Addis Ababa sits at nearly 8,000 feet above sea level; the elevation is sure to put the hurt on late in the race.