ultramarathon
noun
ul·tra·mar·a·thon
ˌəl-trə-ˈmer-ə-ˌthän 
-ˈma-rə-
: a footrace longer than a marathon
Examples of ultramarathon in a Sentence
Recent Examples on the Web
For instance, studies show that ultramarathon runners expend large amounts of energy on race day, but cannot sustain that level of output over the long haul.3
Scientists are still trying to understand how this is possible.
—
Claire Bugos, Verywell Health, 11 Aug. 2025
Baltimore ultramarathon swimmer and artist Katie Pumphrey has once again successfully navigated the English Channel, completing the 21-mile swim in 14 hours and 13 minutes on Wednesday.
—Mathew Schumer, Baltimore Sun, 30 July 2025
Since then, Frederick, who is sponsored by the performance running brand Mount to Coast, has amassed an impressive resume of ultramarathon finishes, including a second-place, 136-mile total at the USA Track & Field 24-hour championship in 2024.
—Devin Kelly, Outside Online, 29 July 2025
The Western States 100 ranks as America’s top ultramarathon, launching from the Palisades Tahoe ski resort and ascending to nearly 9,000 feet before dropping into Auburn, California.
—Brian Hiatt, Rolling Stone, 30 June 2025
See All Example Sentences for ultramarathon
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Claire Bugos, Verywell Health, 11 Aug. 2025
Baltimore ultramarathon swimmer and artist Katie Pumphrey has once again successfully navigated the English Channel, completing the 21-mile swim in 14 hours and 13 minutes on Wednesday.
—Mathew Schumer, Baltimore Sun, 30 July 2025
Since then, Frederick, who is sponsored by the performance running brand Mount to Coast, has amassed an impressive resume of ultramarathon finishes, including a second-place, 136-mile total at the USA Track & Field 24-hour championship in 2024.
—Devin Kelly, Outside Online, 29 July 2025
The Western States 100 ranks as America’s top ultramarathon, launching from the Palisades Tahoe ski resort and ascending to nearly 9,000 feet before dropping into Auburn, California.
—Brian Hiatt, Rolling Stone, 30 June 2025
See All Example Sentences for ultramarathon
Cite this Entry
“Ultramarathon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ultramarathon. Accessed 1 Sep. 2025.
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