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

In North America, ultramarathon finishes have roughly tripled since 2010, exceeding 150,000 runners last year, according to UltraRunning magazine. — Nickademus De La Rosa, Time, 28 Oct. 2026

That being said, there is no shoe that’s universally perfect for trail and ultramarathon running, Schneider explains. — Jen Ator, Travel + Leisure, 15 Oct. 2026

In Utah, dozens of runners and volunteers who were part of the Moab 240 ultramarathon were evacuated Sunday after being stranded by flooding. — Jaimie Ding, Arkansas Online, 13 Oct. 2026

Severe weather also slammed Utah during the Moab 240, a five-day-long ultramarathon. — Jason Allen, CBS News, 12 Oct. 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