January is all about Burrito League, the grassroots running challenge that grew out of the ashes of a corporate marketing gimmick ...

Once used as a form of punishment for prisoners, this kind of training has taken on many forms for more than a century.

BASE jumpers Boris Egorov, Vladimir Murzaev, and Konstantin Yaemurd take us inside their daring and historic leap from the summit of Fitz Roy.

Harvard scientists find that exercise variety is good but not too much and only certain types. Take the findings with a grain ...

Step one foot behind you. Bend both knees to 90 degrees to lower down in the lunge. Pause for a moment, then press through ...

A new webcam captures the moment of truth as skiers attempt the 20-foot plunge into Corbet’s Couloir, a narrow ski line at Jackson Hole Mountain Resort.

After at least 50 successful viewings, this is everything I know about seeing (really seeing!) the northern lights. I'll ...

Deer Valley just unveiled one of the biggest ski resort expansions in history, and our columnist Graham Averill reports on skiing it, with a two-time Olympian, no less.

Yosemite, Glacier, and other NPS sites are ditching timed-entry programs and reservation systems, raising fears that summer ...

A freak fly-fishing accident left industry veteran Jim Klug unable to see—and fighting his way out of one of the most remote ...

Staying healthy is key to the quest for glory in Milano Cortina, so athletes are deploying the latest science.

The ‘Free Solo’ star wrote another chapter in the history of rock climbing with a high-profile stunt beamed live around the ...