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These five red flags might be keeping you from running faster

The six-race weekend is steeped in trail running culture and community

Farvard is one of 17 athletes selected for The North Face’s Athlete Development Program. His mountain objectives, including this month’s Western States 100, have never been more ambitious.

These minimalist vestpacks deliver all-day comfort on fast-and-light routes

For the second time in eight months, the Vermont-based runner took seventh at the World Mountain and Trail Running Championships long trail race, locking down another Team USA podium finish.

Snow will likely impact finishing times at both races. Here's the latest update on conditions in the Sierras.

First there was altitude training. Then it was heat training. Now it’s… pollution training?

Racing in last year's Western States 100 Mile Endurance Run changed my life and made me fall even deeper in love with running.

What storytelling around running can tell us about where the sport is headed

Joe Gray finishes fifth in the men’s race; Kenya wins both team titles

Here are five ways to celebrate Global Running Day, even if you never knew it existed

What are the impacts of your shoe quiver, and how can they be reduced?

How to address common foot ailments and injuries in trail running

Some athletes are turning to the prescription drug to regulate their weight - here’s why experts say that’s dangerous.

Here are the most important things to know before catching a flight for your next trail running adventure

Whether you’re experiencing a menstrual cycle or need to go number one or two, here are the current sustainability guidelines and etiquette for ‘business’ on the trail.

Turn that vacay into a trail-running foray with these popular destination races

We tapped a gaggle of testers—from a search and rescue pro to an aspiring tennis star—to sort the top sport watches for any activity

After a five year hiatus, thru-hiking legend Heather “Anish” Anderson just set another FKT, the 250-mile section of the Appalachian Trail that runs through Pennsylvania. In this essay, she explores how her relationship with the sport has evolved over the past decade since her ground-breaking Pacific Crest Trail record in 2013.

2021 Outsider of the Year Steph Catudal’s new memoir, ‘Everything All at Once,’ offers a raw look inside the paradoxical landscape of grief and surrender, love and loss of her father, and nearly her husband, endurance athlete Tommy Rivs

Here’s a look at the gear, tech, media, and general miscellany our Outside Run editors loved last month

Loaded American team heading to June 7-10 World Mountain and Trail Running Championships

If race organizer Rick Trujillo’s friend hadn’t abandoned him on his first run over the pass, the race might never have been

Here’s how to maximize the benefits of that “hurts so good” feeling

The ultra runner and endurance skier is open to whatever the mountain gives her—she wants to experience a new adventure and inspire other women to do the same

The sportswear brand is backing scientific studies to understand women’s sports performance

The legendary trail runner and mountaineer was trying to climb the world’s highest mountain from the West Ridge

Race director Megan DeHaan partners ultrarunning and agriculture to celebrate and protect open space

Disregarding smart nutrition strategies is a surefire way to not reach the finish line. Here are the most effective ways to sabotage your next big race.

Hello Grindstone! With an East Coast race on the docket for 2024's Golden Ticket races, and CCC replacing UTMB, how will this change reshape the startline at the U.S’s most competitive 100-miler?

Outdoor time with your partner is more than just fun—it can be the key to a superstrong bond.

As multiuse trails get more crowded, we can all do our part to avoid conflict.

Doug Mayer tells interesting stories behind the rise and growth of UTMB

The good news: If we can harness the power of the peak-end rule, we can actually enhance our training.

Plus, how you can test the range of motion of this often-forgotten joint

We put thousands of miles on 85 different shoes over six months to find the best new models for every type of terrain

We tested nearly 20 hydration packs on everything from roads to rugged trails. These five outperformed the rest.

This 10-minute strength routine combines elements of lifting and mobility to make the hamstrings, glutes, and quads ready for the hardest runs.

Jennifer Licther, Mike Foote set out to creating visual and emotional connections to fight climate change, and photograph every remaining glacier in Glacier National Park.

Welcome to the world of the Cowgill Trail Collective

Social media influencers have started a trend of posting videos of them running long distances without training. Here’s why the science says it’s probably not a great idea.   

We traveled to Los Angeles to Strava’s exclusive event of panels and announcements. Here were some of the essential things we learned about where the tech giant is headed. 

A list of basic and completely necessary items that every trail runner needs for taking on their next endurance challenge.

The New York-based upstart apparel company’s community ethos isn’t just for show

In-race data collected during the world championships sheds new light on how top endurance athletes avoid overheating

We asked experts what to consider before you hit the pavement

Runners with chronic illness inhabit two faraway worlds–one characterized by fitness, and one characterized by debilitating symptoms and daily uncertainty

How Tommy Byrne’s journey inspired him to make space for mental health in the endurance community. 

Plyometrics can make you a more efficient runner, and it turns out they don’t need to be complicated or risky

It’s completely normal

In her new series for Women's Running, seasoned non-runner Dimity McDowell invites you to meet the heartfelt challenge to stop running.

Christine Yu makes an argument for a sports system finally designed with women in mind in her new book Up to Speed. 

Bulking up? Only lifting heavy? Avoiding soreness? How is your strength routine (0r lack thereof) holding your trail running back.

Whatever terrain you encounter the Salomon Ultra Glide 2 can handle with its cushioned, stable, and nimble ride

Manuel Merillas of Spain and Daniela Oemus of Germany claim victories at the first race of the 2023 Golden Trail World Series. Top performances by Britain’s Jon Albon and New Zealand’s Caitlin Fielding. 

Trail Alsace Grand Est by UTMB includes four races that end in Obernai

Despite the proliferation of destination marathons, some runners are making a conscientious decision to stay closer to home. But they wouldn’t judge you.

A new documentary highlights the grit and guile of the Desert RATS Stage Race

Erratic, joy-filled exercise could make you a fitter—and happier—athlete.

We put the brand’s fit tool—and the shoes’ runabilty—to the test

Whip up this sticky, easy, carb-filled plate after a tough endurance workout

All ski jackets and pants will eventually be available in three fit choices: fitted, regular, and relaxed, and skiers can choose them based on fit and style preference

Your HRV can be a helpful indicator for several trends in your training. It can also predict an oncoming decrease in mental wellness. Here’s what we know.

The more time you spend outdoors, the more nutritious your food choices may be

Yes, this shoe comes in other colors. No, that doesn’t mean you should buy it.

One of Europe’s most popular and rowdy mountain marathons gets underway this weekend in the Basque country of northern Spain. Here’s what you need to know. 

We crunched the numbers from hundreds of thousands of Strava uploads, to see how athletes running in different marathons train differently, and why the Boston field is so speedy.

There’s no precise answer, but there are cues to find out what’s best for you.

A light and fast technical trail shoe with exceptional feel for the trail

New data finds that endurance- or speed-oriented muscle fibers don’t determine how you respond to strength training

Our basic biology can steer us toward bad habits and compulsive behavior. Overcoming these pitfalls requires effort and discipline.

Dakota Jones replicates the first international victory he earned on La Palma in 2012

New studies confirm that spending time outside can ease physical symptoms

Michael McKnight, from Smithfield, Utah, won the Cocodona 250. Coming from the 62nd position at mile 78, McKnight finished with a time of 69 hours and 41 minutes. Sarah Ostaszewki, of Flagstaff, Arizona, was the first female finisher.

5 tips to help you feel less critical and embrace your body.

You may know that you need carbs to perform well, but not always for the reasons you think. Here’s the new science on why going carb-light can actually be hurting your performance.

Here’s a look at some of the Outside Run Editors’ favorite finds this month, from gear obsessions to favorite podcasts, recovery drinks to massage tools.

Can this super-energized drink take ultrarunners to new levels? Yes, absolutely!