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ultramarathon

American  
[uhl-truh-mar-uh-thon, -thuhn] / ˌʌl trəˈmær əˌθɒn, -θən /

noun

  1. any footrace of 50 or more miles.


Etymology

Origin of ultramarathon

First recorded in 1975–80; ultra- + marathon

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

And after competing in the Sydney Marathon this August, he’ll run a 100-mile ultramarathon in Arizona in October.

From Los Angeles Times • Mar. 6, 2026

Earlier research found that ultramarathon runners often experience a breakdown of healthy red blood cells during races, which can potentially lead to anemia.

From Science Daily • Feb. 21, 2026

In his new memoir, “Everything You Want Is on the Other Side of Hard,” runner Ken Rideout relives a physically grueling 2023 ultramarathon in the Gobi Desert.

From The Wall Street Journal • Nov. 1, 2025

Sophie Power had not even laced up her trainers for her first run when she signed up to an ultramarathon.

From BBC • Apr. 29, 2025

It had been an incredible, symbolic day for our family and I hoped for the country, but it was also a kind of ultramarathon.

From "Becoming" by Michelle Obama

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