The triathlon market in the U.S. may be significantly larger than reported, as an analysis by TriFind uncovered 625 non-affiliated events with 53,000 finishers that are not included in USA Triathlon's data.

We asked AI to project winners and losers if Ironman had implemented its new 20-meter rule before the 2025 World Championships. The hypothetical results range from modest to eye-opening (and suggest some pros should revamp their race strategy).

Looking to race a half-iron - or 70.3 - triathlon this year? We rounded up everything from long-standing community favorites to inaugural branded races to bring you the best in the U.S.

Race rule updates, an ambitious goal of 10,000 new triathletes for Supertri, and the discontinuation of a popular tri series - catch up on the multisport news you may have missed in January 2026.

The Ironman Pro Series ups the ante with a new draft zone and an increase in RaceRanger technology. Get the details, plus what this means (and doesn’t mean) for age-groupers.

Curious how the pros beat the weather and take their fitness to the next level behind closed doors? We reached out to some of the best for an inside look at how they set up their “wattage cottages.”

Triathlete just launched a text-to-speech feature that makes it easier to stay caught up on the headlines—without spending more time in front of a screen. Here's how to access it.

Are you training too much? Mental health and endurance sport researcher Jill Colangelo breaks down a study on how endurance athletes misuse food and exercise.

The bike is the longest part of a triathlon. If you’re uncomfortable on your bike or ill-prepared, it will have a large impact on your finish time. These workouts, tips, and expert-backed insights can transform your bike skills this season.

Van Rysel has a new concept TT e-bike that might scare you. I say embrace it.

Looking for the perfect Ironman race? Meet Jill Walker, your ultimate guide. As a 100-time Ironman finisher, this age-grouper has the insider information you need to help you choose the best Ironman race for you.

Tim Heming makes his bold predictions for triathlon’s rising stars and unexpected shakeups at every distance.

One of the best ways to introduce your coworkers to the health benefits of triathlon is through this fun, friendly month of swim, bike, and run.

Google recently unveiled its Preferred Sources tool, meaning you now get to choose which news outlets you see first in search results. Here’s how you can put Triathlete at the top of your list.

From championing sprint races and improving race broadcasts to reducing reliance on new gear and swapping social media for real-world connections, our editors have compiled their collective wish list for a healthier, more sustainable, and exciting future for triathlon.

$250,000 prize purses sound massive, but most of today’s professional triathletes rely on side hustles, not race checks, to stay afloat. Is it possible to build a sustainable professional triathlon career in the current landscape?

From participation surges and economic pressures to record-breaking performances, triathlon is poised to have a big year, experts say.

The 2026 professional triathlon season promises more action (and drama) than ever before with a packed schedule across Ironman, T100, World Triathlon, Challenge, Supertri, and XTERRA racing. Here’s when and how to watch the best in our sport.

With prize money stabilizing at almost $17 million, Thorsten Radde crunches the numbers to see who claimed the biggest share of professional triathlon's 2025 prize money earnings.

Looking for details about the sport of triathlon? We provide the essentials to prepare you for beginning training or spectating for a friend.

Our editors have done plenty of races around the USA, big and small. From historic race series to mountain-air challenges and flat, fast courses, these are the locally-owned triathlons we love the most.

Wondering what you missed for triathlon stories in 2025? We recap the 10 most-read stories so you can catch up before the new year.

This year's triathlon photographers captured the grind and glory of pros and age-groupers in all the best ways. Take a swim, bike, and run through an inspirational season (though be warned: you might be inspired to sign up for a 2026 race right away).

From racing to wipe out school lunch debt to rewriting the record books, the extraordinary feats of 2025’s age-group triathletes are a powerful reminder that there is greatness in every one of us.

From better breathing in the swim to absorbing shock for peak running performance, the pelvic floor plays a crucial role in triathlon performance. Strengthen yours with these three targeted exercises for men and women.

Do certain factors lead to a higher DNF rate at Ironman Races? Data guru Russell Cox analyzes athlete performance over the last 13 years in search of trends.

Planning out your race calendar next year (and looking to PR)? A triathlon statistician broke down the data to find the fastest and slowest 70.3 races in 2025.

Ironman and Challenge may be the big kids in age-group triathlon, but Supertri and T100 entered the mass participation scene in earnest this year, and XTRI and XTERRA also made some big moves. Our end-of-the-year report provides both participation data and exclusive insights from the races themselves.

A triathlon statistician breaks down the data to reveal the fastest and slowest Ironman races of the year.

Brazil’s recent triathlon boom has once again brought the sport to a reckoning with privilege and inequality - one that feels all too familiar to triathletes and race directors around the world.

It was the year of the rookie at the Ironman World Championship, athletes obliterated records, and newcomers showed they can make an impact. Expert triathlon analyst Thorsten Radde details the top pro performances in triathlon for 2025.

Despite the "growing pains" and event fiascos of 2025, the Professional Triathletes Organization is strengthening its partnership with a financially struggling World Triathlon to launch an all-encompassing Triathlon World Tour in 2027 and increase mass participation.

It was a fight to the finish in Qatar - Laura Siddall breaks down who’s taking home a share of the $2.94 million bonus pool for the 2025 T100 Tour.

It’s been a year of many goodbyes in professional triathlon. As several of the sport’s biggest names announce their retirement, we reflect on the careers, victories, and legacies they leave behind - and discover what might be next.

One race remains in the 2025 T100 Tour. Here's how the pro athletes stack up and their chances of winning part of the season-end $3 million prize purse.

A stray golf cart damages pro bikes, the first all-women’s world cup, and more kept late-season racing interesting this weekend.

Triathlon all-rounder Hayden Wilde is thriving in middle-distance triathlon - but he’s still got his eye on the LA 2028 Olympics and a future in Ironman.

After retiring earlier this year, the Australian photographer shares what was happening behind the camera of his most well-known images from his legendary career.

Ironman has released 2025 RaceRanger drafting data from the Pro Series, and we explain what the pro-only stats reveal about various courses, men’s racing versus women’s racing, and more.

Death Cab for Cutie, My Morning Jacket, Cage The Elephant, and other musical acts to take the main stage in Denver May 29-31, 2026

Age-grouper Carey Cribb sacrificed her own race - and her bike - to help a fellow athlete at 70.3 Worlds in Marbella.

Anchorage, Alaska–based triathlete Samantha Skold shares how training primarily indoors gave her an edge for the age-group title in Kona.

From flat whites to crocodile ribs, these races are perfectly situated for athletes to conquer the course, then call for the tasting menu.

Save up to 60% on editor-tested and recommended triathlon gear.

What drives a triathlete to race double the distance of an Ironman? We talked to five Ultraman World Championships competitors to find out.

Staged finish-line photos, lap counting chaos, and protests galore - Laura Siddall breaks down what happened at Dubai T100 and shout-outs pros who crossed their final finish line at the encore edition of Ironman Arizona.

Ironman has revised its new qualifying system for Kona world championship, introducing gender-specific slot roll downs and separate performance pools based on participation to address the gender imbalance that had been favoring male athletes.

Dubia T100 is the final race before the Grand Final in Qatar where nearly $3 million in prize money will be awarded.

On TUEs, two-way battles, $70K injuries, and rule-enforcement concerns.

The Ironman 70.3 World Championship was the final race of the Pro Series, and we know know how the bonus bucks will be shared. Laura Siddall breaks down the biggest men's and women's paychecks in Ironman and 70.3 triathlon.

Jelle Geens ran shoulder-to-shoulder to the finish line with Kristian Blummenfelt, ultimately edging him out to take the win.

Following a DNF in Kona just four weeks prior, Lucy Charles Barclay showed top form to win the 2025 70.3 World Championship, edging out three-time winner Taylor Knibb, who took second place.

There was no shortage of raw, late-season honesty in Marbella, Spain, from the pros in the mix at the 2025 70.3 Ironman World Championship.

Low participation rates plague Omani Ironman races, compared to other multisport efforts in the Middle East. Can they turn it around before hosting the 70.3 World Championship in 2029?

From late bloomers to friendships forged in competition, the qualifying journeys of age-groupers competing at this weekend’s 70.3 Worlds represent the best of triathlon.

Bob Babbitt is live from Marbella, Spain, talking with professional athletes before the 70.3 World Championship this weekend.

World titles and $1.7 million in award money for the Ironman Pro Series are on the line in Marbella, Spain, this weekend. Trirating expert Thorsten Radde analyzes who is most likely to win it.

From altitude bases to home setups, here's where some of the world’s best are fine-tuning for the year’s biggest middle-distance races.

A popular Midwest race fills up early bird slots for 2026, new events added to World Triathlon portfolio, and more - catch up on the multisport news you may have missed this month.

The debate over experience, safety and the allure of jumping straight into the deep end.

This weekend, 57-year-old Jill Walker completed her 100th Ironman triathlon in Florida. Along the way, she’s found joy, a global community, and plenty of very good (good, gooooood) dogs.

Former professional triathlete Laura Siddall analyzes half-distance performances from dark horse athletes leading into the 2025 Ironman 70.3 World Championship in Marbella, Spain.

From finish-line highs to post-race lows, a triathlete’s mind, body, and spirit takes quite the rollercoaster ride at the end of the season. Dr. Daya Grant explains the science behind the slump - and how to cope.

This year's 70.3 worlds will feature an all-star lineup, including Taylor Knibb, Lucy Charles-Barclay, Kristian Blummenfelt, and more. See the full start list and race numbers for the women's and men's pro races, plus how to watch the free livestream on Outside TV.

From Lucy to Rudy, these pro triathletes share their hard-earned, unfiltered wisdom on life, training, and the need for warm clothes.

Wollongong proves it's never over until it's over with dramatic finishes in the World Triathlon Series Final and exciting T100 racing.

A recent study peers deep into the family tree to find a Neanderthal mutation - present in 20% of modern humans - might be detrimental to endurance athletic performance.

Our Kona rookie and veteran started the 2025 Ironman World Championship 10 minutes apart, raced under the same sun, and met again at mile 21 on the run. Here’s what the data, heat, and island gods taught two athletes at opposite ends of experience.

After Wollongong, two Middle East T100 races will decide this year's overall champion. Athletes are vying for crucial points this weekend. Here's how they stack up.

10 of the 54 pro women who started did not finish at last weekend’s 2025 Ironman World Championship in Kona. From headaches to stomach issues to sheer suffering in the heat, find out what happened to athletes like Chelsea Sodaro, Taylor Knibb, Lucy Charles-Barclay, and more.

Asics dominated, representing half the top-10 finishers, with On and Hoka models making strong appearances.

Saturday's Ironman World Championship in Kona was wild. It left question marks on who will win the 2025 Ironman Pro Series.

We take a look at the bikes ridden by the 10 fastest cyclists in the women's pro race at the 2025 Ironman World Championship in Kona, Hawaii.

The Ironman World Championship has made a lot of progress in the last three years of women’s-only racing. Now it must avoid a setback.

Re-live the pro race at the 2025 Ironman World Championship in Kona through the lens of Triathlete staff photographer Brad Kaminski.

Matthews started the run over 14 minutes down from the leader. She finished just 35 seconds off the win.

Løvseth is the fourth Norwegian to win this race on her debut, and that’s not a coincidence, she says. Here’s why.

On a day that saw soaring temperatures and unexpected withdrawals in the podium positions, Solveig Løvseth proved best in her first try at the Ironman World Championship.

More than 1,700 of the fastest women in the world at the full distance will race tomorrow in Kona. Members of the triathlon industry count the bikes, aerobars, components, wheels, and more gear they used to get to the start line of the 2025 Ironman World Championship.

The sponsorship announcement, made on the eve of the Ironman World Championship, is controversial - but in triathlon’s current landscape, it’s also a smart business decision.

We spoke with athletes and industry leaders on the Big Island ahead of the 2025 women’s Ironman World Championship to find out what they’ve loved about the last three years, and what they hope Ironman will bring forward as we return to a mixed-gender format in 2026.

In this exclusive video interview, Daniela Ryf, Mirinda Carfrae, Michellie Jones, and Julie Moss tell us what they really think about Kona, competition, self-doubt, and ice cream.

With roughly 25% fewer racers in town than Kona has seen in decades and $1 million less in total entry fees, when compared to recent history, there is something different about 2025.

“I think it's really great to have all of these strong women here, because I think that is what you need. You need strong competition to push your limits.”

What started as a protest against triathletes wearing Speedos in public has turned into a charity fundraiser and beloved race-week tradition at the Ironman World Championship in Kona.

We get unprecedented access to two age-group women and follow along as an Ironman World Championship rookie and a veteran prepare for the most prestigious triathlon in the sport.

Competition will likely show early signs of who will take the tape at the women's Ironman World Championship. Thorsten Radde provides a likely play-by-play breakdown.

Bob Babbitt sits down with athletes as they prepare for competition.

Triathlete magazine's editors are on the ground in Kona bringing you live, behind-the-scenes coverage. Check our live blog often for the latest.