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Ankle injuries are common in trail running, here’s how to prevent them

Time for a six-month check-in! Here’s what the data says about how athletes are sticking to their goals in 2023.

The boat people volunteers who shuttle runners across the American River at mile 78 on the Western States 100 Mile Endurance Run have seen it all

From humble beginnings to advanced fabrics and plates, what a strange trip it’s been.

A trail running therapist shares her tips for using mindfulness to race and train better

Whether you want to try for an FKT or take a more leisurely outing, here are a few adventure runs to put on your list

Whether she’s setting mountain FKTs or working to bring attention to climate change, Hillary Gerardi is a force of nature

Tips on how to train and race in muggy and hot conditions

The historic ultramarathon in Vermont was canceled due to historic floods and a state of emergency. This didn’t stop race organizers and runners from helping out those in need.

Follow Black Diamond athlete, Kyle Richardson, in Rio de Janeiro while he explores styles of Brazilian drumming and trail running

These off-road-ready supershoes provide pop while adapting to tippy terrain

Feeling out of shape? Maybe you should run up and down a mountain three times.

Focus on your own training and performance as you immerse in the local community and the unique challenges of the natural environment

This avid runner wore his GPS watch 24 hours a day for one month, performing every single workout it suggested

Common causes and solutions for when it’s hard to eat during a race.

Four experienced runners and coaches share their biggest mistakes and lessons learned in trail and ultrarunning

David Hedges sets new FKT (Fastest Known Time) on the Nolan's 14 route in Colorado.

Jean-Luc Diard, cofounder of Hoka, has been innovating in the outdoor world for decades and he’s not done yet

Ultrarunning helped this athlete prepare for the rigors of a space mission.

Aurelien Dunand Pallaz led the men's field from early on for a win while Dauwalter battled from second place to surge for the win and course record.

After a very snowy winter, race officials and volunteers put in huge efforts to make sure the course was safe enough to be run this year

There are both healthy and harmful ways to get away from it all, psychologists point out

I’ve tried dozens of hot-weather tops, shorts, glasses, and hats over the years. Here are my favorites.

From silver mining to live-streaming, this legendary “wild and tough” ultramarathon in Colorado’s San Juan Mountains has a storied past. What will it mean for Hardrock to embrace trail running’s future?

There’s nothing difficult about this nutrient-dense green recipe to keep the immune system strong and recovery speedy

Trendy recovery gimmicks are advertised everywhere, but professional trail runners know it’s all about prioritizing the basics.

The quest for a sub-four day Long Trail continues, but Kelly sets the supported FKT in some of the rainiest conditions imaginable

Age slows everyone down eventually, but that’s no reason to quit trail running.

A small subset of Hardrock Hundred runners stretch to complete a superhuman series.

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

Tips on how you can guard against the most common overuse injuries.

Here’s everything you need to know about the 2023 Hardrock 100.

For the past 100 years, real-world and lab experiments interacted across continents to create our current understanding of training theory. We can learn a lot about our future by understanding our evolutionary past.

Injury to the Achilles tendon can be long-lasting. Here's how to diagnose, treat, and prevent it.

At the end of my mother’s struggle with Alzheimer’s disease, I realized I needed to handle my sorrow the same way I approached athletic training.

It’s mountain adventure season! Here’s what experts say about staying safe up high.

Running volume is important, but how you structure your training might matter more

Researchers look back on the lessons from 25 years of “live high, train low.”

For Indigenous cultures, running represents a spiritual connection to the natural world.

A new documentary on Tom Evans' win at Western States by adidas TERREX.

Kelsey Hogan sets new 100-mile course record, while Americans podium at the Golden Trail Series 25K

Canyons 100-mile winner Alyssa Clark is preparing to toe the line in the rugged Pyrenees.

The outdoor gear giant’s new Swiftland Multi-Trail running shoe is eco-friendly, but how does it perform?

These joints are essential for all of your outdoor activities. These movements will keep them functional and healthy.

After finishing Western States, the 62-year old ultrarunning legend has her sights set on Badwater and Hardrock

Frequent injuries—and the pain that comes with them—can actually improve with time on the trails.

The 11th annual Quebec Mega Trail offers a full weekend of trail heaven, from 100 miles to several sub-ultra races. Here’s what you need to know about this destination race worth considering. 

When you consistently stress the body and the mind, you change your chemical makeup

His meticulous, data-focused preparation and race-day approach served him well

A science-led look at how heat acclimation, hydration, and cooling strategies can help you improve your performance when the temperature rises.

This year, 62 runners finished in the final hour before the cutoff.

Four unconventional ways to manage chafing on your next run—and effective alternatives

Some doctors are now prescribing physical activity for mental health. Here's why.

Here are the factors to consider when adapting your race-day nutrition strategy.

Tom Evans wins the overall title in a historic day of running

After a 6th place finish as top American in 2022, Yingling talks balance, stress, and wanting to put herself in the mix at this year’s Western States Endurance Run.

We tested the Garmin Fenix 7X Sapphire Solar and Suunto 9 Peak Pro for months to determine which is the best.

After dropping out due to injuries in two previous years, Montgomery is really, really, really ready to tack a crack at the legendary 100-mile race.

Physical fatigue, muscle soreness, and age greatly impact post-race recovery and sleep patterns.

Many endurance athletes become so regimented that they forget to listen to their bodies. Here’s how you can get back in touch with your body.

Local authors and trail runners Bob Crowley, Hal Hall, and Tim Twietmeyer wrote a book to highlight and document the history connected to the race course.

This ultrarunner is partnering with Rising Hearts and GU Energy Labs to bring her self belief to ultrarunning’s biggest stage: the Western States Endurance Run.

This 75-year-old Philadelpiha runner hopes to become race’s oldest finisher.

Guiding athletes, teaching life lessons, and sharing running thoughts with a metronome of consistency.

Our annual Western States 100 statistics celebration is here! Prepare yourself for data that might add some fun context to the 2023 viewing experience.

After 50 years, America’s most cherished ultra-distance race might have the deepest field ever

Seasoned pros and fast newcomers shine in short-and-fast sub-ultra races

Are ketones the key to newfound speed? Not so fast, say experts. Here’s what to know about the fueling approach some athletes say has helped them level up.

In an excerpt from her forthcoming book, ‘Up to Speed: The Groundbreaking Science of Women Athletes,’ longtime Outside contributor Christine Yu argues that female athletes deserve their own benchmarks for athletic success.

From foraging wild asparagus to scouting for the perfect shot, these runners are proving there’s no wrong way to run

The former Navy SEAL faced deep snow, gusting winds, and sheer ice on North America’s highest peak. But he still smashed the previous records set by Karl Egloff and Killian Jornet.

After recovering from a broken foot, she’s back ready to chase another top-10 finish.

One of the world’s leading kung fu masters has trained the Wu-Tang Clan, Björk, and Wesley Snipes. Running is central to his training. Here’s why. 

Women are vastly underrepresented in scientific research. This wearable company wants to change that.

Strava data scientists compiled numbers from Western States 100 Mile Endurance Run finishers, from 2018 to 2022, to help us investigate patterns behind successful finish times. Here’s what they found. 

The future of coaching and how trail running presents a unique challenge for artificial intelligence.

Led by Murphy’s gold and bronze medals, Team USA notched 10 top-10 finishes at World Mountain and Trail Running Championships.

One writer on why she might innately crave adventure.