ultramarathon

noun

ul·​tra·​mar·​a·​thon ˌəl-trə-ˈmer-ə-ˌthän 

-ˈma-rə-

: a footrace longer than a marathon

ultramarathoner

ˌəl-trə-ˈmer-ə-ˌthä-nər 

-ˈma-rə-

noun

Examples of ultramarathon in a Sentence

Recent Examples on the Web

Here, in a sleepy suburb just outside the city along the banks of the River Avon, Jackson is in the process of running his 81st consecutive ultramarathon, surpassing the men’s record which stood at 80. — Rob Tanner, New York Times, 20 Aug. 2026

That all forms part of Seals’ training for an annual 135-mile ultramarathon held in July in Death Valley, California. — Scott McFetridge, Los Angeles Times, 17 Aug. 2026

However, exactly where the ultramarathon will take them has yet to be determined. — Tiney Ricciardi, Denver Post, 31 July 2026

All of this could also explain why the performance gap between men and women in ultramarathons is often smaller. — Claire Maldarelli, Scientific American, 2 July 2026

Word History

First Known Use

1964, in the meaning defined above

Rhymes for ultramarathon

• arrondissement
• ferrosilicon
• lycopersicon
• mesencephalon
• polysilicon
• stereopticon
• telencephalon
• agamemnon
• automaton
• diencephalon
• panopticon
• phenomenon