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• The half marathon is the world's fastest-growing race distance — over 8,000 half marathons are held globally each year, with more than 2 million finishers in the US alone.
• The IAAF did not recognize the half marathon as an official world record distance until 1994.
• The men's world record for the half marathon is 57:30 (Jacob Kiplimo, Uganda, 2021) — a pace of 2:44 per kilometer.