VO₂ max can drop 7 percent in just 12 days—but muscle strength holds on longer

Here's what happens when the dedicated employees of Rocky Mountain National Park start to break down

Lace up and lace your line with these tester-approved snowboard and splitboard boots

Writer Kate Siber interviewed 50 biologists, researchers, educators, and advocates about the superpowers of animals. Her new book, 'The Hidden Wisdom of Animals,' explores how tuning in to the wild can teach us to slow down, listen deeply, and reconnect with what it means to be human.

Braverman’s first picture book is inspired by her irrepressible pup Leap—and the lessons of individuality and teamwork she carries on the trail

Our Articles Editor recently indulged in the autumnal outdoor tradition of corn mazes, hay rides, and familial frustration

Scientists explore the links between how many calories you can digest and the ultimate limits of endurance

The new biography 'Dirtbag Billionaire' explores Patagonia founder Yvon Chouinard's philanthropy, as well as his life as a Yosemite climber and alpinist

You’ll sweat, cramp, gasp for air—maybe even hit the dreaded wall. Here’s just how far your body will go to get you across that finish line.

The author and her partner recently ascended a 10,000-foot peak in the Cascades while dressed for a cocktail party

We teamed up with the experts at SKI to find the most versatile, confidence-boosting skis for every mountain and condition

Spooky season is here! We hit the road to explore some of the scariest treks from coast to coast. From the Witch's Castle in Oregon, to Maiden Cliff in Maine, these trails have frightening lore.

While anti-inflammatory food lists usually focus on leafy greens and berries, nutrition experts say this orange squash deserves a spot at the top

Conner Mantz recently shattered the U.S. men’s record at the Chicago Marathon. Mantz, 28, takes us inside his historic race.

Meet Carl Cocchiarella, Colorado’s least-successful elk hunter. After four decades of near misses, he’s learned that killing an animal isn’t the best part of a hunt.

Turns out there’s a science to good cheering, and most of us have been doing it wrong

For a premium price, the Thule Outset makes pitching your tent as easy as parking your car

The best Nordic ski gear provides comfort, support, warmth, and breathability, all in a deceivingly streamlined package

Choosing the right time to stretch can make a huge difference in your flexibility gains and range of motion

After collapsing into tears at the trail terminus, the 30-year-old hiker welcomed her birthday with Oreos

Some of these moves might feel intense. So, if you need some cushioning, keep a few pillows nearby.

Believe it or not, you don't have to break the bank to complete your mountain bike kit

Ultrarunner Olivia Amber recently spent four days climbing California’s highest peaks to set the women’s speed record on a famed route

Fall’s favorite ingredient isn't just for pie—it’s my new secret protein weapon

Now 64, the famed rock climber shares her wisdom on learning new tricks, maintaining friendships, and pushing her comfort level

At nearly 1,800 pounds, polar bears are roughly three times the size of a black bear

Also included: a 15-minute warm-up and a 10-minute cool-down

Researchers believe Shackleton knew of his ship’s weaknesses in ice. Should that change our understanding of the classic tale of survival?

A professional astrophotographer shares her must-have gear for clear skies and starry nights

A new study asks whether 100 years of plush redesign has turned the wild’s most feared predator into a comfort object—and changed how we think about nature itself

Ease shoulder and neck muscle tension fast with these moves

A skeptic set out to see if the Japanese wellness practice works outside of the forest

At an age when most individuals are bouncing grandkids on their knees—if their knees even function—Carlos Soria Fontán returns, time and time again, to the most inhospitable regions on Earth, to test himself

From gestures to tech, small accessibility tweaks can make every mile safer and more enjoyable for Deaf athletes

Madeleine Bryant completed the entire end-to-end Grand Canyon trek alongside her father over the course of 17 years

Minimal effort, maximum relief

Plus, advice for breaking up with your running buddy

The best part? You probably already have this product in your bathroom cabinet.

Our articles editor reckons with his new role on the local bicycle ride: guy who tries hard and gets dropped

All you need is a six-inch plyo box to get started

If you're a runner, you probably like spending at least part of your vacation getting some miles in—here's how to pack so that your running gear doesn't take up too much space

It's delicious and packs a hydrating, antioxidant punch—according to nutritionists

Polish ski mountaineer Andrzej Bargiel skied from the summit of Mount Everest all the way to Base Camp without the use of supplemental oxygen

“Extreme environmental physiologists” weigh in on what the human body really needs

Colorado’s “Climbing Smiths” completed the 67 highest peaks in the contiguous United States in 1974. It took them just 48 days.

I took this lightweight, battery-free scope into the wilderness to test its stargazing potential

Everything You Need to Know About Apple’s New Ultra Watch 3, iPhone 17 Pro, and AirPods Pro 3

She was the only hiker ever to die while seeking the summit of central Colorado’s most famous 14er. A member of the successful search team investigates who she was, how her death—and her recovery 19 years later—impacted her family, and what we all need to consider before heading into the alpine.

It even helped keep my plantar fasciitis at bay.

I never liked eye masks until I tried this one

It was messy and chaotic, but it reminded me how resilient I really am

Turned off by the one-upmanship and addictive nature of fitness tracking, a reader contemplates giving it up for good

Three expert running coaches swear by these creative and fun ways to mix up your training

Hikers often refer to the 501 shelter (mile 1196) as the “pizza shelter” because its location allows users to order pizza directly to it. A new NPS policy that targets “nonconforming infrastructure," has put it at risk, along with the Eckville shelter.

From Half Dome to The Wave, some of the most renowned outdoor destinations require reservations. Still want to go? Get out your calendar and mark these dates.

In light of multiple alleged dog-related assaults on trails, Outside consulted a canine behavioral researcher to learn more about training and protecting our furry best friends

Known for both her gorpcore experiments and collabs with big-name design brands, Nicole McLaughlin has bridged the gap between outdoor gear and high fashion—and could very well transform both for the better

After three Colorado River trips totaling more than 70 days, Outside associate editor Madison Dapcevich spent a week rowing whitewater through the Grand Canyon’s sister river

This matters even if you're naturally an early riser

Tanner Mansell, a Florida diving guide, saw his life turned upside down after he freed captured sharks on a fishing line

Discomfort in this area can affect gait, hip function, and mobility

The North Coast Trail, on Vancouver Island, takes you deep into the territory where several seasons of the reality show were set

The big difference between a 13er and a 14er? One is considerably less crowded, by a huge margin. Consider us converted.

As a practicing Pagan, I'll welcome in fall with a moonlit hike. Here's where to go to view the Corn Moon on September 7, tips for navigating the trails at night, and how to add a little magic to your trek.

No fancy equipment is needed—just your finger, your Notes app, and 60 seconds a day

You can text and make calls without your phone, plus Garmin's emergency features are now built into the watch

Because doing it at the wrong time can throw off your zen for the rest of the day

After moving into a small home in a mountain town, a reader is inundated with guests. Is it impolite to house them in a camper?

Thinking about a big snow year? These natural indicators—from acorns to caterpillars—might give you a heads-up before the first storm hits.

For the first time ever, I look forward to packing my bag for a trip

Plan, download, and navigate the backcountry with Gaia GPS’s new features designed for vehicle-based adventure

We polled space-weather experts, astrophotographers, and aurora guides for their top tips for enjoying "solar maximum" — the 11-year peak of Northern Lights activity. Here’s what they said.

We’ve crossed deserts, mountains, and swamps together. But nothing prepared me for what my first solo backpacking trek would feel like.

All you need is a doorway, a chair, and a stretching strap

You probably think you need a 4WD van. Chances are, you don’t.

What started as a neglected patch of grass is now where I work, rest, host, and recharge—and you can create your own version, too

The attempt to sell millions of acres of Forest Service land united Republicans and Democrats. Advocates took valuable lessons from the battle.

An hour of darkness, silence, and floating changed how I think about stillness

In her latest essay, Woniya Thibeault explains how starvation and seclusion impact a participant’s psyche once the days turn into months

Knowing your foot shape, arch, the way you walk, and even your toe shape makes it easier to find comfortable, supportive shoes that fit