Sue Johnston has been setting FKTs for decades and inspired a generation of ultrarunners along the way. If you've never heard her name before, that's by design.

Heart-rate apps bring Olympic-caliber recovery to everyone

James Lawrence completed 50 Ironman distance events in 50 states in 50 consecutive days to bring attention to childhood obesity.

The guy who is snagging Kilian Jornet’s speed records is just getting started.

For every workout you do, startup Charity Miles makes a donation to a philanthropic cause of your choice.

Our innate desire for adventure has some going big in the mountains.

Hardrock veteran Kirk Apt has logged 2,010 miles and 680,000 feet of vertical ascent through the San Juan Mountains since 2000. Here's how.

Top shoe brands are racing to enter the super-cushioned fray. We review 2014’s corpulent shoe crop.

The science is out on whether ultrarunning is good or bad for our hearts—but I'm sure the Hardrock 100 is good for mine

Endurance coach and author Ben Greenfield guarantees your brain, guts, and groin will thank you

Challenge your abilities with these iconic runs through the wilds of America.

You love to run. You hate to get hurt. Even if injuries are inevitable, there’s plenty you can do about them. Here’s your guide to fixing the most frequent problems.