ultramarathon

noun

ul·​tra·​mar·​a·​thon ˌəl-trə-ˈmer-ə-ˌthän How to pronounce ultramarathon (audio)
-ˈma-rə-
Synonyms of ultramarathonnext
: a footrace longer than a marathon
ultramarathoner noun

Examples of ultramarathon in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
More than 20,000 runners took part in the world’s oldest and largest ultramarathon earlier this month, a nearly 55-mile (89 kilometers) race between the South African cities of Durban and Pietermaritzburg. Paige Bruton, semafor.com, 22 June 2026 The woman who keeps beating men in ultramarathons runs on mashed potatoes. Greg Rosenstein, NBC news, 18 May 2026 In 2024, the Germany native completed a 1,864-mile ultramarathon from Berlin to New York City in 74 days. Jordan Greene, PEOPLE, 14 May 2026 An ultramarathon runner is speaking out after becoming the first woman in history to win the Cocodona 250, a 250-mile endurance race, and setting a course record in the process. Faith Bernstein, ABC News, 8 May 2026 See All Example Sentences for ultramarathon

Word History

First Known Use

1964, in the meaning defined above

Time Traveler
The first known use of ultramarathon was in 1964

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Cite this Entry

“Ultramarathon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ultramarathon. Accessed 29 Jun. 2026.

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