New data from 2.5 million marathon finishers finds that subtle changes in air quality can affect your race time ...

Awe doesn’t have to be reserved for far-flung places. Instead, take a moment to learn about the landscape just outside your ...

Five questions with UCLA climate scientist Daniel Swain, who warned of “extreme fire danger” in Southern California days ...

If you plan to spend multiple, consecutive days in the same pair of socks this winter, socks with high wool content are the ...

Our national parks are called America's Best Idea for a reason. Here's how to have the most epic adventures in the most ...

When our trail columnist first started sliding silicone spacers between his toes, friends chuckled. But now these little separators are getting the moment they deserve.

The EXPLORE Act aims to address the housing crisis in gateway communities, increase outdoor access for veterans, kids, and ...

In last days of his presidency, Biden adds more protected sites to a long list of conservation accomplishments ...

Winter can be a tough time for athletes. Motivation an issue? Or can’t do your favorite workout? No problem. This ...

Tina Lewis was enjoying a “trip of a lifetime” before she was detained at an airport in India. Her crime: traveling with a ...

We haven’t seen the Red Planet this luminous in the night sky since 2022. Our astrotourism expert shares how and when to enjoy the show.

A team of wildlife experts and ice climbers worked to rescue a bull elk that became tangled in a climbing rope at Colorado’s ...