Think you have what it takes to complete this grueling race?
Check out these well-known challenges that runners take on in our national parks.
These newlyweds will represent the U.S. at the World Mountain Running Championships on Sept. 14 in Italy.
Take these top tips to heart heading into your next ultra.
American wins prestigious UTMB race in France for the second straight year.
The Ultra-Trail du Mont-Blanc and its sister races are drawing more Americans than ever.
This year's events will see 7,500 athletes from 77 countries.
The two-time Western States champion recently released his first book, Hal Koerner's Field Guide To Ultrarunning.
Here's what it means for those wanting to do the popular Rim-to-Rim-to-Rim run.
One of ultrarunning's most accomplished stars shares his philosophy on long runs, strength training, improving your technical skill set and