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Etymology edit

ultra- +‎ marathon

Noun edit

ultramarathon (plural ultramarathons)

  1. A running race over a distance longer than 42.195 km (26 miles 385 yard), the length of a standard marathon.
    • 1977, The Marathon: Physiological, Medical, Epidemiological, and Psychological Studies, New York Academy of Sciences:
      In South Africa, one of our most popular ultramarathon races is over 56 miles.

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