Matt Hart (@TheMattHart) is a freelance journalist whose work has appeared in The New York Times, The Atlantic, and National Geographic, among other publications. He lives in Boulder, Colorado.
Sue Johnston has stayed under the radar for decades while being one of the country's top ultrarunners and fastpackers.
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.
On February 19, Karl Egloff, finished a hard push to the top of 22,837-foot Aconcagua in 7 hours, 55 minutes, fueled mainly by a handful of energy gels and bars.
Corporations sponsor the Charity Miles app, which automatically donates money as you exercise.
The Nolan's 14 and how we are hardwired for adventure.
On July 11, human anomaly Kilian Jornet smashed the six-year-old course record at the Hardrock 100 Mile Endurance Run. Despite Jornet's unbelievable speed, Coloradan Kirk Apt, who finished in 39:38:...
There are few debates more polarized in the running world than the one between maximalists and minimalists.
In a race that saw altitude, stormy weather, and course conditions take down some of the best endurance runners on the planet, Kilian Jornet sauntered to a new course record at the storied Hardrock...
Outside catches up with the author of "Beyond Training: Mastering Endurance, Health, and Life" to find out if it's possible to train at a high level while having a family, job, and life outside the...
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 it. Here’s your guide to fixing the most frequent problems.