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The two adventurers that fell in love with each other, then the legendary line linking 14 of Colorado’s highest peaks.

Here's how to keep your running clothes lasting longer and out of the landfills.

This blood marker is a warning sign that your body may be dangerously low in iron.

In this week’s Performance Corner, learn an effective way to think about why hard workout and heavy weight training sessions matter in making you a faster, stronger runner.

Built to help runners see and be seen, Knog’s Bilby Run 400 headlamp not only lights the way but also keeps runners visible to trailside traffic

The Backyard Stories is a new podcast and written column following athletes and local food advocates who are deeply investing in their home ecosystems - their backyards.

Team USA will be sending a strong team to the first combined championships in Thailand

We’re asking thirty-one elite runners and visionaries thirty-one rapid fire questions. What makes them tick? Up next, Faith Briggs.

Mood swings? Fatigue? Hungry all the time? Here’s how to know if you need to switch things up with your food decisions.

This quick workout will help build strength and a range of motion in your ankles, knees, hips, spine, and shoulders

Eliud Kipchoge just set a mind-boggling world record at the Berlin Marathon, running 2:01:09 to break his own mark by 30 seconds. Analyzing his training to become the GOAT in the marathon could provide fascinating insights for all athletes.

His newest book, Discipline Is Destiny, has essential lessons for committing to a lifelong pursuit of running. 

Coach Vanessa Foerster offers five steps to regulate your emotions

A Siberian Yupik Alaskan Ultrarunner Fights For Every Breath

Alpacka Raft’s featherweight Ghost is changing the game for multisport adventures.

Though COVID isn’t going anywhere soon, the newer variants may have fewer long-term effects for something all athletes care deeply about: our hearts.

Why the global triathlon giant opted to go all-in on a niche sport

Learning to adapt training and mindset through Alaskan winters

In the past, Apple watches were a novelty act for serious endurance and outdoor athletes, but with an improved battery life and legit workout functions, the Apple Watch Ultra is actually in the (long) race.

Our running goes through seasons. Embracing general fitness over peak performance takes an attitude adjustment.

The diagnosis is tricky and can easily be confused with sciatica—and it's one of the most common running injuries.

Episode Three brings two of the greatest mountain athletes of all-time together for the very first time. Despite their different activities, Kilian and Tommy find connection in their passion for the mountains.

With record-shattering descents and a deep love for the mountain, Colorado-based Mascarenas overcame unhealthy habits and injury to become the Queen of Pikes Peak.

Working towards better balance might actually be what is keeping you from finding passion in life and potential in running. Instead of seeking balance, practice integrating who you already are with what matters most to you.

Everyone has a Why. Our motivations are as varied as our backgrounds, and these passions are what powers adventures big and small.

An August 2022 study used an ingenious study design to put two approaches against each other: a set training plan versus a plan that changes based on objective and subjective recovery data. The individualized plans had significantly higher rates of adaptation and fewer instances of non-response, with implications for how we think about adjusting training over time.

Trails don’t maintain themselves. Here’s what trail work is and why you should consider volunteering, even if it isn’t required.

Elite ultrarunner Tim Tollefson created a local event that invites everyone to enjoy running mountain trails through races, panel discussions, and films.

Women tend to play down their accomplishments. Here’s why ultrarunner Sally McRae wants that to change.

The supplement Athletic Greens/AG1 seems to be everywhere in the endurance market these days. Registered Dietitian Matthew Kadey takes a look at "greens powders" for athletes and whether they deliver on their mighty claims.

Here’s what we know about the Mosquito Fire, how local communities are being affected, and what Western States 100 race organizers are doing to respond.

An elite running trio runs 125 across one of the oldest trails in the world in Greenland.

Eating for activity is not as complicated as you think.

One month before toeing the line at this weekend’s Run Rabbit Run 100, a backcountry skier finds inspiration and mentorship to push the pace across one of Colorado’s toughest running routes.

Andrea Sansone spent the summer scouting Nolan’s 14 before setting the FKT over Labor Day weekend

Team USA hauled in a lot of medals at World Snowshoe Championships in Argentina

Kilian Jornet, aka the Greatest Of All Time, just published a summary of his training data and practices for all of 2022. His post is destined to be a legendary guide to thinking about training theory and what it takes to have the best season ever. Let’s break it down.

With the help of a supporting community, Courtney Dauwalter continues to push the envelope while playing in the mountains.

With the biggest purse in ultrarunning and a new team challenge, this Colorado race attracts some of the fastest in the world.

Three days: That's how long it took endurance athlete Jeff Garmire to finish the John Muir Trail. But from health scares to falling asleep while hiking, it was anything but a casual stroll.

But what does it take to keep this mysterious connector primed for sport?

Ultrarunning, why? The Diversity of Motivations and Experiences in Ultrarunners

A perfect partnership and years of mountain travel made an improbable traverse possible

In our new column, Ask Alex Anything, elite mountain athlete, and Portland, Oregon-based nutrition expert Alex Hasenohr fields some of the most important questions about fueling and running. 

There’s a new trend in trail running eyewear and it’s large, fluorescent, and retro. But how? But why?

Curious what's trending? Here were the five most popular Trail Runner articles published last month.

Fall races are looming on the horizon and in many places we’re at the peak of summer heat, so here’s what our editors have been running in, listening to, and reading.

It’s an unfortunate tragedy, but, many argue, high-mountain adventure can never be completely free of risk

The watch-maker Coros published a fascinating snapshot of Kilian Jornet’s training data in the weeks leading up to his course record performance at UTMB. Let’s break it down.

360 YOU ultra athlete Sally McRae shares how she has approached the first three races (335 miles over 6 weeks) in her #ChooseStrong project.

Runners make common mistakes when it comes to keeping their feet healthy for the long run.

Kilian Jornet’s mindset and approach to sport is changing the game for the better

This weekend is the World Masters Mountain Running Championships in Ireland. These five runners are more than ready to bring their A-game, no matter the age.

Reebok’s Floatride Energy 4 Adventure delivers a road-shoe ride with just enough toughness for dirt

UTMB is a brutally challenging race, but the race-week hype, world-class competition, and global party vibes have a way of making every runner feel special

Spoiler alert: Research shows fasting might not be the answer for female athletes looking to maintain good metabolic and cardiovascular health

With integrated carbon plate technology and balances propulsion and cush, this shoe is fun and fast as heck.

We caught up with Jim Walmsley after his 4th place finish at UTMB

An August 2022 study tracked performance before and after pregnancy in 42 elite runners. While every pregnancy journey is different, there was an exciting finding—athletes “who intended to return to high-level competition did so at a statistically similar level of performance in the 1- to 3-year period post-pregnancy.” A whopping 46% improved performances post-pregnancy. 

Two improvising trail runners on making it up as you go

2022's Edition of the Ultra Tour de Mont Blanc is in the books. Here are the stories and changes we're tracking, and what they mean for the trail community.

HRV can help you decide when to push—and when to hold back—for optimal fitness and recovery.

By running her own race and trusting her own pace, Dani Moreno finished third at UTMB’s OCC race, the first of three American women in the top 10.

Dogs may be the perfect running partners: They're always ready to go, they eagerly keep pace, and they never complain about being tired. But not every dog is built for running. The ideal jogging companion is low-maintenance and obedient, with energy and endurance.

In episode one of Peaks Project from Black Diamond, Richardson and Boulder community members share why this mountain is so special to them.

Wild and crazy running adventures on the Colorado pack-burro racing circuit

Long COVID can affect anyone, and women runners are no exception. Often, the experience of a runner with long COVID is one of isolation alongside the physical symptoms.

The biggest climate change legislation ever has just cleared the senate. Here’s why trail runners should care.

The essential ingredients in Hannah Allgood’s mountain adventures are curiosity and self-belief.

With Midwest roots and South American training, Schmitz is ready to push her limits.

The historical data at UTMB paints a fascinating picture of one of the hardest and most competitive races in the world. Using data on past race-day results and splits, Dr. Marshall Burke completed regression analyses that provide 4 insights and predictions about what we might see in the 2022 race.

Check out Brian Metzler's author page.

One woman marks seven years of sobriety by attempting to run the Grand Canyon’s 47-mile Rim-to-Rim-to-Rim trail run in one push. It all sounded great and symbolic. In theory. 

More and more runners are asking questions about the green stuff to help with everything from post-workout soreness to sleep (and even a little fun). Here’s everything you need to know about cannabis use while training and racing.

Anchored by relentless positivity, Sabrina Stanley’s career continues on an upward trajectory.