Kick off summer with Outside Days—and get outfitted for better hydration, sun protection, storage, and style with smart picks ...

The mountaineer, REI visionary, and environmental advocate was the defining figure of 20th-century American climbing.

The Scottish pioneer, who won eight Emmys for his work alongside David Attenborough, suffered a brain hemorrhage while on a trek to Annapurna Base Camp.

Both women have some advice—and routes—to share when it comes to expanding your running horizons.

There are so many reasons to love trail running. The benefits for mind, body, and soul. The community. The thrill of races.

Allegations of fraud and poisoning in Himalayan tourism have already had a huge impact on the Mount Everest guiding industry ...

Tersus Solutions partners with brands like Stio, The North Face, and Arc’teryx to clean, repair, and recirculate used gear—to ...

A study of hundreds of hikers and runners reveals a dangerous gap between how safe we feel and the gear we actually carry.

The Air Quality Index, or AQI, is an air quality alert system maintained by the U.S. Environmental Protection Agency (EPA).

From powering Starlink to running diesel heaters, these portable power stations handled real off-grid use better than ...

You don’t have to leave the planet to feel like an astronaut. From hidden craters to secret NASA training grounds, these ...

We traveled to the front lines of Japan’s battle against the moon bear, which experts say is responsible for hundreds of ...