The Ultra-Trail du Mont-Blanc鈥攁ka UTMB鈥攊sn鈥檛 just one thing. It鈥檚 the Spandex Superbowl, wrapped in Gore-Tex Mardi Gras with a dash of Chafing World Cup. It鈥檚 a week-long festival of mountain racing that attracts thousands of runners to Chamonix, France.

What started as a stand-alone 171K (106-mile) race in 2003 has transformed into a weeklong acronym circus under the banner of UTMB Mont-Blanc. The alphabet soup of race names reference the tiny alpine villages in France, Italy, and Switzerland the races pass through. The epicenter is in Chamonix, France (elevation 3,400 feet) at the base of Mont Blanc鈥攖he highest summit in the Alps at 15,781 feet鈥攚here some of the races begin but all finish amid hordes of enthusiastic fans.

Beginning on August 24, the French village鈥檚 cobblestone streets will teem with compression-sock-clad competitors who will line up at one of the six events throughout the week. The six smaller races (perhaps in prestige, rather than mileage, as in the case of PTL) lead up to UTMB, considered by many to be the sport鈥檚 crown jewel.

But if you鈥檙e in Chamonix, the races are just the tip of the glacier. Walk through town during the last week of August and you鈥檒l find numerous fun runs, brand activations, parties, film releases, and new trail running shoe drops. If you鈥檙e a fan of the sport, it鈥檚 a who鈥檚 who of trail running athletes and personalities. And even if you鈥檙e not running one of the seven races, it鈥檚 still a fun time to be in Chamonix because there are hundreds of miles of trails to be run in between bouts of spectating, cheers, and chasing the races.

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Here is a rundown of the week鈥檚 races.

Spanish ultra trail star Kilian Jornet en route to a fourth victory at the fourth Ultra-Trail du Mont-Blanc (UTMB), where he set a new record time of under twenty hours. (Photo: Photo by JEFF PACHOUD/AFP via Getty Images)

UTMB: The Ultra-Trail du Mont-Blanc

The marquee and last event of the week-long series, UTMB completely circles its namesake summit in just over 100 miles with a whopping 32,808 feet of vertical gain鈥攎ore than it would take to summit Everest from sea level. About 2,300 runners will attempt to traverse the course鈥檚 10 alpine summits in under 46 hours 30 minutes.

Jim Walmsley became the first American man to win UTMB in 2023, but American women have crushed it in Chamonix since its inception. Krissy Moehl won the inaugural event in 2003, and again in 2009. Rory Bosio racked up two consecutive victories in 2013 and 2014, and Nikki Kimball claimed the title in 2007. Courtney Dauwalter won it in 2019, 2021, and 2023鈥攖he latter of which capped off an epic summer that also included wins at the Western States 100 and the Hardrock 100.

Other UTMB Mont-Blanc Races

PTL: Petite Trotte 脿 L茅on

Perhaps UTMB鈥檚 most distinctive event, the PTL takes teams of two to three runners over 300K (186 miles) of rugged, unmarked terrain around Mont Blanc. Named for an adventurous French baker and hardcore volunteer, it takes many teams the allowed 151 hours to get to the finish line in Chamonix. The PTL begins on the morning of August 26 in Chamonix and the final cutoff is September 1 just before UTMB officially ends. The course changes every year and there is no official winner. The event is so challenging that finishing is judged as a win.

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MCC: Martigny-Combe-Chamonix

The MCC is a 40K (24.8-mile) race for the 鈥渂茅n茅voles鈥� and 鈥済ens du pays,鈥� the volunteers and locals who help with UTMB. The shortest of the races, it provides an accessible yet surprisingly challenging (7,500 feet of elevation gain) glimpse into the French Alps. This year鈥檚 MCC begins in Martigny on the morning of August 26.

TDS: Sur les Traces des Ducs de Savoie

The extra-technical TDS is the 鈥渃ool-kids鈥� race, historically attracting a who鈥檚 who of mountain runners from around the world. With the advent of the UTMB World Series in 2022, which does not officially include TDS, this race has diminished in competitiveness and prestige a bit. However, it remains just as rugged. TDS traverses 148K (92 miles) from Courmayeur, Italy, to Chamonix around the Mont Blanc massif. This 鈥渕id-distance鈥� (by UTMB standards) event hosts 1,600 runners, and has a 42-hour cutoff. The TDS begins on the afternoon on August 26 and the first finishers will arrive in Chamonix on the morning of August 27. No American has ever won TDS, but Hillary Allen ran a ferocious race and finished second in 2019.

ETC: Experience Trail Courmayeur

The newest race to UTMB week, the ETC is a grueling 15K (9.3-mile) race from iconic village of Courmayeur, Italy, that includes a beastly 3,937 feet of total elevation gain in the heart of the Italian Alps. This year鈥檚 ETC will begin on the afternoon of August 27 and runners will have four and and a half hours to complete the race.

OCC: Orsi猫res-Champex-Chamonix

Probably the closest thing UTMB has to an entry-level race, this 55K (34-mile) race is a testing ground for many future UTMB competitors. It sends runners from Orsi猫res, Switzerland, to Chamonix during the daylight hours. The route climbs over 11,000 feet as it winds through the Swiss Valais region with a 14-hour-30-minute cutoff. The OCC begins on the morning of August 29 and the first finishers will arrive in Chamonix by early afternoon.

CCC: Courmayeur-Champex-Chamonix

Previously seen as the 鈥渓ittle sister of the UTMB,鈥� CCC has become a respected race in its own right with a demanding 101-kilometer course that ascends over 20,000 feet. It just about covers the last 100K (62 miles) of the UTMB course, which offers an in-depth preview for many runners with UTMB dreams. Historically, Americans have been successful at CCC, with notable American victories by Clare Gallagher, Hayden Hawks, and Zach Miller. This year鈥檚 CCC will begin at 9 A.M. local time on August 30 in Courmayeur, Italy, and the first runners are expected to arrive in Chamonix later that evening, just a few hours after the UTMB runners depart from downtown.

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This year鈥檚 is right around the corner鈥攚hich means some of the best athletes in the trail-running universe will be meeting up in Chamonix, France, to test their mettle on one of the sport鈥檚 biggest stages.

With this year, athletes will have more to fight for than ever. And you can get a front seat to the action without leaving home. Here鈥檚 how to watch the 2024 UTMB World Series Finals, including the 50K championship, OCC, the 100K championship, CCC, and the grand finale 100-mile championship, the 106-mile Ultra-Trail du Mont-Blanc (UTMB), from August 29-September 1.

Catch the Action Live

What started as a stand-alone race has transformed into a weeklong festival of alphabet soup acronyms. There are eight total races during the week from August 26-September 1, but the three races that make up the official UTMB World Series Final鈥攖he OCC, CCC, and UTMB鈥攚ill all be brought to you via drones, bike and runner follow cams, and non-stop commentary.

Last year, 国产吃瓜黑料 and UTMB World Series to make it easier to stream the UTMB鈥檚 top trail-running events. This year, the partnership continues鈥攚hich means you can watch 10 of the series鈥檚 best events live on 国产吃瓜黑料 TV.

The championships racing action starts on Thursday, August 29 with the OCC as runners start from Orsi猫res, Switzerland (and race the final third of the loop to Chamonix). The action continues straight into Friday morning with the start of CCC in Courmayeur, Italy (which sends runners along two thirds of the loop to Chamonix), and culminates with the cr猫me de la cr猫me, the full-loop UTMB, which kicks off in downtown Chamonix that evening at 6 P.M. local time. The 106-mile race with roughly 32,800 feet of climbing and descending is a time-honored test piece for lifelong ultrarunners, up-and-coming rookies, and elite-level pros alike. For many, it鈥檚 the most anticipated trail race of the year.

Race Schedule

How to Watch

All three races, OCC, CCC, and UTMB, will be available to watch for free on 国产吃瓜黑料 TV. If you鈥檙e sleeping and miss the action live, no sweat. will also be able to watch on demand after the finish anytime, on any device.

While You Wait

Looking for some pre-race inspo? You can watch the best of the UTMB World Series on demand鈥攊ncluding and the from earlier this year and the 鈥攐n 国产吃瓜黑料 TV. Plus tune into for previews, analysis, and real-time coverage as our editors report live from the slopes of Mont Blanc.

There are two ways to watch UTMB live and on demand:

• On the web at
• Via the 国产吃瓜黑料 Watch app (, , and Roku, Amazon Fire TV, and Android TV)

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