New data identifies two key risk factors for high-altitude pulmonary edema, a leading cause of death on the mountain.

Meteorologists on America’s windiest mountain recently experienced historically violent gusts—and captured video of the chaos ...

Thousands of blood cancer survivors have received life-saving treatment thanks to a small army of inspired cyclists, hikers, ...

I walked into my first silent meditation retreat thinking I’d entered the zombie apocalypse—blank stares, slow steps, and an ...

Alpine locales have their own microclimates, which makes forecasting a tricky business—and a local fixation. Who dares try ...

In 2014, the International Olympic Committee unveiled something it called “relative energy deficiency in sport,” or REDs. The ...

The Great Saunter route took me around the entire perimeter of Manhattan. All that walking helped me rethink my marathon ...

Alex Hutchinson is a National Magazine Award-winning journalist and Outside’s Sweat Science columnist, covering the latest research on endurance and outdoor sports. New perk: Easily find new ...

Is your trip stuck in the group chat? With G Adventures, you can travel for yourself without going by yourself.

New perk: Easily find new routes and hidden gems, upcoming running events, and more near you. Your weekly Local Running Newsletter has everything you need to lace up! Subscribe today. Dear Sundog ...

Discover America's most scenic roads with the top national park drives. Our guide features eight stunning scenic routes with ...

New perk: Easily find new routes and hidden gems, upcoming running events, and more near you. Your weekly Local Running Newsletter has everything you need to lace up! Subscribe today. Truck ...