At least 16 people have died at the park this year, including five fatalities in August alone. No single factor is to blame, but several deaths have followed stretches of extreme weather.

The insurance workers were on an office retreat in the Rocky Mountains when they met at dawn to begin a hike to the summit of Mount Shavano. But one man didn't make it back down until the next day.

NPR correspondent Brian Mann went trekking on Sao Miguel, one of the most remote islands in the North Atlantic. He found volcanic mountains, birdsong, solitude and lots of rain.

Viewers of the Katmai National Park bear cameras caught more excitement than they may have hoped for last Tuesday when a hiker wandered into view, mouthing the words "help me."

At 5 years old, Harvey Sutton — also known on the trail as "Little Man" — is one of the youngest people known to have completed the roughly 2,100-mile hike.

A Black sisterhood of hikers in Colorado now has chapters across the U.S. and Canada, and includes other sports. "Being around nature, it's like grounding yourself," a founder says. "That is vital."