LFTO investigates why so many veteran runners are lining up for ultras, and what effect ageing has on our ability to perform at our best.

There are now officially two pro runners in the Harrison household. Jon Harrison — whose wife, Genevieve, has been sponsored by On running since 2021 — came into the Run Rabbit 100 last month hoping ...

Correction: A previous version of this article misattributed quotes from Kevin Mathieu and Timothy Sullivan. Sure, vomiting is allowed. Discouraged but allowed, according to the bylaws of this ...

The air was electric in the French mountain town of Chamonix during the 6 p.m. sendoff of UTMB, Europe’s most famous ultra-running race. Among the approximate 2,300 runners on the start line, Logan ...