Uberman, a SoCal ultra-triathlon with a 21-mile swim, a 400-mile bike ride, and a 135-mile run, might be the most demanding challenge of its kind. But in the eyes of its founder, the physical goal is secondary to the mental one.

Insider tips on conquering Aspen’s hottest event

As Arctic sea ice melts, business for Alaskan passenger ships is booming. Can the fragile region handle the traffic?

It doesn't matter if you've ever raced before. Anyone who loves to mountain bike should take on this multiday adventure at least once.

At Big’s Backyard, you never know how long the race is going to last, because there is no finish line

Cruise ships are for tourists. Real travel is for wanderers who don’t want to just see, but experience something different. Packing and planning take a back seat to learning how to simply be in this game. So leave your guidebook at home, snip the Canadian flag patch off your…

Over four days this past May, 26-year-old Estes Park, Colorado–based climber Tommy Caldwell completed what is arguably the greatest big-wall climb in history. Using only his hands and feet, he made a first free ascent—no pulling up on mechanical aids allowed—of the Dihedral Wall, an obscure route on the west…

Meet paleontology's wonder boys—the hard-shoveling, hard-drinking fossil hunters of the Bahariya Dinosaur Project

Searching and Fleeing and Hoping are the verbs that populated Atlin, an almost-mythical town at the very end of the road. Here, the free spirits blew in and settled like random leaves, dreaming of a life amid the wilderness. But society, it turns out, isn't so easily escaped.

There are many threats to the 50-year-old Wilderness Act. But the most dangerous, Kenneth Brower says, comes from those who are chipping away at the very idea of wilderness itself.