ultramarathon

[uhl-truh-mar-uh-thon, -thuh n]
|

noun

any footrace of 50 or more miles.

Origin of ultramarathon

First recorded in 1975–80; ultra- + marathon
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for ultramarathon

Contemporary Examples of ultramarathon