Critics say the first sub-2:10 marathon was impossible—and fueled by doping. Our columnist examines the science as he tries to make sense of the backlash.

Fall is in full swing, and our editors are loving every minute of it. Here are the pieces that are keeping us cozy outside this season.

I fought the resurgence of these goofy packs until I figured out that they’re convenient and comfortable—especially when worn as sling bags

Ultramarathoner Callie Vinson shares her running journey and the lessons she’s learned along the way

The husband of runner Camille Herron admitted to having altered the Wikipedia biographies of prominent ultrarunners. The revelation came after a Canadian journalist launched an investigation.

Mountain runner Michelino Sunseri appeared to have climbed the iconic peak in record time, but the arbiters of speed determined it didn’t count

Follow the lead of these light-footed adventurers, and reap the rewards

Researchers were once convinced that some people have a bigger training response than others—but the data says otherwise

The season is coming to an end—here’s the gear that is keeping our editors outside until the very last moments of summer warmth

A Swedish company’s baking soda formula was the hottest supplement at the Olympics. And now a new study finds that it really works.

Endless singletrack, postcard views, and tight-knit community make the PNW a trail runner’s paradise. New to the scene? Local experts share their tips and favorite gear for soaking up the magic.

Five questions with running coach David Roche about his improbable victory and course record at the iconic ultramarathon

Stay healthy and energized with whey protein

The gear that let us brave monsoon season in the west and heat waves in the east

New technology is distorting track records. Ethiopian running legend Kenenisa Bekele makes the case that his world records are superior to the current ones.

Everyone knows how to run. Now biomechanical analysis may teach us how to do it better.

It's Dauwalter’s third straight course-record win, while almost 49-year-old Pommeret nailed the grueling 100-mile event on the first try to take down Kilian Jornet’s course record

After recovering quickly from the emergency surgery on July 5, Miller was hopeful to start the 100-mile race through Colorado's San Juan Mountains

These women-founded maternity activewear brands make it easier to stay active during pregnancy

Slippery granite rock and snowed-in trails were no match for the gear we used this June

Our Sweat Science columnist tries out the heat adaptation protocol used by Oregon runners, and survives (barely) to tell the tale.

This beautiful 469-mile route connects Great Smoky Mountain and Shenandoah National Parks. Our local writer knows just where to stop for hikes, camping, and the best views.

A trove of ethnographic data reveals that persistence hunting—early humans relying on superior traits to chase down prey—was a worldwide phenomenon

Springtime corn ski sessions and hikes in the Rockies were just a few of the adventures we went on. This is the gear we used to get out there.

Hard training and good genetics give elite runners an edge, but the four-minute barrier may have its own magic

Hiking shoes, tents, swimwear, and more to help you kick off summer in style

The year’s top gear for outdoor adventures, reviewed here

We took our newfound favorite pieces to sunny spring crags, soggy campsites, and slushy ski runs

Athletes train for years to overcome pain, exhaustion, and fatigue. But some people take it too far and are never the same again.

Who better to hold you accountable than your pup?

Use this local’s guide to six of America’s top running cities to connect with vibrant communities, explore essential routes, plug into don’t-miss events, and get equipped with the right shoes and resources to use them like never before

More than 30,000 runners celebrated the 128th annual marathon with sunshine and blue skies. Athletes from Ethiopia and Kenya dominate the elite fields.

The fitter you get, the more likely you are to feel that you can’t get enough oxygen during hard exercise

They both have benefits. Here’s how to use them to feel and perform better.

This is the race women runners have been waiting for

We didn’t let this weird winter stop us from getting outdoors. Here’s the gear that helped us ski, run, hike, and get outside this season.

Singer-songwriter David Lindes found his way into running with help from the most unexpected teacher: a bull moose

At Outside Inc., we've got experts in all kinds of travel, from adventure to backpacking to cycling to yoga and then some. We asked all our best editors and writers at every brand to reveal where they want to go in the world in 2024. You'll find endless inspiration in their stories—and the travel bucket list of a lifetime.

Oh, you wanted to take a fun little trip to run a breezy 100K? Think again. This course is relentless, technical, and populated by nudists.

The two pursuits have more in common than meets the eye

The Rab Veil 12 comfortably carried everything we needed on runs from neighborhood jogs to 100-mile adventures—and let us reach what we wanted without taking the pack off

The quest for adequate support can make running less efficient by forcing your breathing muscles to work harder, new research finds

How do you make the best of a golf addiction? Add running.

Mike Foote is a professional athlete. Brendan Leonard is a non-professional athlete. And he has some questions.

The logic is good and the anecdotes are common, but the evidence is shakier than expected, researchers find

Our newest brand, powered by the editors of Outside, is ready to fuel all your running passions

New research suggests exercise may boost the “love hormone,” the latest in a long line of brain-boosting molecules

Strava’s year-end report shows that more runners are turning to competition and how different generations compete differently

Sometimes a curated trail running getaway focused on mindfulness and fun is exactly what you need to rejuvenate your running.

With the Olympics, otherworldly shoes, and trail running at a crossroads, 2024 could be the most fascinating year in running ever

InsideTracker’s massive database of more than 23,000 runners shows that more mileage is associated with better biomarkers

Paired with a convertible dumbbell/barbell, I have all the weights I need

The most memorable running articles of the year, according to the editors of Outside Run

We looked at thousands of data points on Strava to determine what winter habits make for a successful summer season

As an avid runner, I didn't know what to do with myself once trails became buried under snow. Then I discovered running snowshoes.

The Speed Project underground relay—traditionally run from Los Angeles to Las Vegas—spread its wings this year, going bigger and harder across Chile’s brutal Atacama Desert

These wear-tested running gear picks offer performance, craftsmanship, and versatility at a good price

You felt fine a day after your long run—so why the heck are you slogging through your easy workout two days later?

After three-plus hours on the treadmill belting out every song on the Eras tour, I can tell you why Swift’s concert training regimen works

Growing numbers of NCAA athletes are inking NIL deals. For some companies, it’s a marketing “lightbulb moment.”

A selection of (mostly) new titles for fans of science, endurance, fitness, and adventure

Martinus Evans, who goes by @300poundsandrunning on Instagram, didn’t feel at home in the running community. Now, he's on the cover of magazines, has published a book, and is still running—at his own pace.

The most versatile runner on the planet gave us a marathon debut for the ages

The guidelines for returning to training after giving birth are “vague and inconsistent.” That’s no surprise.

Rest, relaxation, and running shoes—you’ll see some of the most spectacular places in the world at these races

From a big-city organizer to a nomadic competitor, these unique runners build community bonds and promote their benefits

After a devastating near miss in 2019, Jenny Hoffman shattered the coast-to-coast fastest known time

These community builders and boosters each take an unconventional tack to rally runners and build grassroots running communities in cities across the U.S.

Fancy new midsole materials like PEBA make you faster, but at the cost of durability

Criminal-turned-athlete John McAvoy is harnessing the transformative power of sport to put young people on a better path

Following significant athlete pushback, USA Track & Field moved the race’s start time earlier. But the governing body also needs to offer Trials host cities a better deal to prevent similar issues in the future. 

SOAR Running’s ultra-light racing vest promises to conduct heat away from your body. We put it to the test.

Harvey Lewis, who recently ran 450 miles to win Big’s Backyard Ultra, discusses the mental trickery that goes on during ultrarunning’s hardest race

The 52nd annual marathon will send 50,000 runners on a 26.2-mile running journey through the Big Apple’s five boroughs on November 5

The relationship between mental health and running is complicated. Understanding it can be a game changer.

Minor enhancements have improved this light and lively max-cushioned everyday trainer 

When you’re plodding so slowly it feels like you're moving backwards, wouldn’t it be better to just... walk?

Have you had freakier encounters on a run than these? We doubt it.

We put over 50 pieces of winter running apparel to the test in all conditions to find the best pieces to keep you warm, dry, and comfortable in the cold.

We put in more than 1,900 miles testing 135 items. Here are the best.