T24 XTREME TRIATHLON - MONT-BLANC PASSY 2026
- Next event : 26 Sat ➜ September 27, 2026Date confirmed
The event in a few words
24 hours non-stop? Yes, yes, you read it right, the T24 Xtrem Triathlon, is no joke 😬. Anyway, just from its name you can understand, it's an extreme event 😶. Here, see you in Passy, in the beautiful French Alps 🇫🇷. At the foot of the Fiz chain, the mountains will be your allies for this course ⛰️. You will be between the turquoise lake, the Mont-Blanc, and the hamlets of the Plain 📍. Maybe that's what they call a dream setting 💭. We've mentioned the mountains but don't worry, the elevation won't be killer, just an accompaniment 😉. By combining the swim, bike, and run, you'll come out with legs on fire 🔥. Your month of September will thus be punctuated by this challenge, gearing you up for the return to school 💼. Well, given what's planned, alone it could be daunting, but NO PANIC, 95% of participants do this challenge in groups! Yes, you can do all of this in duo or in relay of 4 or 6. 👯♀️
Well, enough talking, let us present the crazy concept that awaits you 🙌. The goal is simple: do the longest triathlon possible, in 24 hours 🕛. For this, you will have a clear program with 4 hours of swimming to start 🏊. On a 1,000 m loop, you will need to do the most rounds possible 🔄. Little advantage, you and your colleagues will feel like you're on a full trip, with an Australian exit for each round! 🇦🇺 Joking aside, it's only the beginning of the challenge 💫. After this first stage, it's time for the bike 🚲. A 20 km loop will be traced and a tip: enjoy it, because you'll be around it for 12 hours, non-stop 🛑. Same principle: the more laps you accumulate, the more points you earn ➕. With this, the night may seem long, but save some energy, it’s not over yet 👀. If your calculations are right, there are 8 hours of running left 📋. For this last event, the team will have to give everything to complete the 5 km until exhausted 🤪. Well, at this stage, unless you are superheroes, it's the mind that will take over for this finale ⚡️.
One might wonder: how do you win? ✅ For each kilometer completed and depending on the discipline, you earn a certain number of points. For swimming, every kilometer will earn you 15 points 🙂. For cycling and running, 1 km will earn you 1 point. So don't aim for 1,000,000, it could be difficult… 🌧️ FYI, the maximum points acquired on a T24 challenge is 1,204 points! That sets the bar quite high 🧐. By the way, if you like this concept, keep a motivated team, because there are others in different cities! 😄 There are: on Ré Island, in Breizh, and in Bormes-les-Mimosas 📍. Since doing one requires being bonkers, might as well push the envelope and do others, right? 😆
WOWWWW! This is not a challenge you will undertake every day, that's for sure 🥵. But at the end of the day you will be more than proud of yourself, or of you all, guaranteed! ✊ Given the 24 hours planned, you'll probably want some rest 💤. Afterward, with a view like this, you'll definitely want to ignore the soreness, to enjoy the surroundings 😍. The commune of Passy is known for offering sublime panoramas 🤩. Our advice: go for local walks to get an unbeatable view of the Mont-Blanc! 🏔️ As we mentioned, FORGET YOUR SORENESS 🫠. Well, there are other ways to enjoy... Like enjoying a good Savoyard fondue 🫕, or perhaps a raclette with cheese and cold cuts from the region 📍. And why not continue in this direction and finish with a homemade blueberry pie 🫐.
With all that, your ticket is surely already booked, you just have to train 🌬️.
5 reasons to join this race
A message from the organizer:
"IN A FEW WORDS... If you're looking for harmony between lakes and mountains, Passy, nestled in the heart of the Alps, is the perfect destination. The routes will guide you through the forest, mountains, and hamlets of the Passy plain with exceptional views. An experience that will test your endurance, with ascents near the Fiz mountain range!
5 REASONS TO DO MONT-BLANC: Passy It's of sheer beauty! The turquoise water, the mountains, Mont-Blanc, the hamlets... you're going to be blown away! It climbs! You'll need to gain elevation, always with an unobstructed view of Mont-Blanc! It's our little surprise And yes! In 2025 it wasn't one, but two new races on the program! It's perfect for disconnecting At the foot of the Fiz range between Lake Passy and Mont-Blanc, you'll feel like you're at the end of the world, where time stops for the weekend. It's the best beer! They say T24's beer pairs very well with fondue ;)"
The distance you'll all agree on
TriathlonTOP
- 26 Sat ➜ September 27, 2026
- Swimming1 km
- Road Cycling20 km
- Road Running4.5 km
A few more words
And here we go for a crazy triathlon. A 24-hour program, with one goal: to do the longest triathlon possible. Whether you're in a duo, in a relay of 4 or 6 or alone, good luck, it's surely going to be tough tomorrow 😆.
It all starts with 4 hours of swimming 🏊. With a lap of 1,000 m, which must be done as many times as possible 🔄. All laps will end with an Australian exit, but don't pretend to be a kangaroo and save your energy to have the most points at the end 🦘. Speaking of points, each kilometer will validate 15 points, so do your best to get a lot! ➕
After this nice little warm-up, in the late afternoon, it's off for 12 hours of cycling. Yes, yes, it's going to be a beautiful night for all participants. A loop of 20.5 km with 230 mD+, will be set to do as you wish 😋. The Alpine nature will offer you magnificent views, even if it’s a bit at night, try to keep your eyes wide open 👀. Here, 1 kilometer = 1 point, so just pedal hard to get through the evening quickly ⚡️.
To finish, what's better than a morning run? 👐 4 + 12 = 16, quick calculations, there are 8 hours left to complete this challenge. If we haven't lost anyone, since it's a triathlon, the end will be running 🏃♀️. Here, you have to tap into the deepest energy, to do this loop of 4.5 km and 20 mD+ as many times as possible. Just like cycling, here the number of kilometers will be equal to the number of points ✅.
Well, after all that one thing to say: BRAVO 👏.
Frequently asked questions (FAQ)
You will be able to collect your race bib at the designated booth: at the T24 village, on Friday, September 25, 2026, between 4 PM and 10 PM.
The races will start at 11 AM on Saturday, September 26, 2026, in Passy.
No, it's not mandatory, but you will need to fill out a FFTRI Health Info Form (to be completed when purchasing the FFTRI Enduro Experience License [formerly competition pass] for Non-FFTRI Licensees). It must be submitted via Klikego or by email to the organization up to 1 month before the start of the race.
Other documents to submit before September 10, 2026:
For FFTRI Competition Licensees, to be provided at registration:
A copy of the 2026 License and the license number
For FFTRI Leisure Licensees, to be provided at registration:
A copy of the 2026 License and the license number
The FFTRI Enduro Experience License (formerly competition pass) corresponding to the event (to be subscribed to during registration).
For Foreign Licensees to be provided at registration:
The FFTRI ITU Pass corresponding to the event (to be subscribed to during registration) if the Federation is ITU affiliated.
The FFTRI Enduro Experience License (formerly competition pass) corresponding to the event (to be subscribed to during registration) if the Federation is not ITU affiliated.
For Non-FFTRI Licensees, to be provided at registration:
The FFTRI Enduro Experience License (formerly competition pass) corresponding to the event (to be subscribed to during registration).
Yes, you must be at least 18 years old on the day of the race (born before 09/26/2008).
Here are the registration prices:
Individual: €424 until 01/25/2026 then €530
2-Person Relay: €344/person until 01/25/2026 then €430/person
4-Person Relay: €224/person until 01/25/2026 then €280/person
6-Person Relay: €176/person until 01/25/2026 then €220/person
No, you have 24 hours of events in total, it's up to you to see if you can complete the entire challenge!
Yes, refreshments are provided, located in the Athlete Zone in the T24 Village and on the Courses.
You will find:
Drinks: Still water, sparkling water, Coca-Cola
Cereal energy bars
Bananas, oranges, mini-sandwiches, pound cake, gingerbread, camembert, sausages, dried apricots, raisins, dark chocolates, cane sugar...
Note also that local and diverse cuisine vendors will be present during the T24 Village opening hours!
For INDIVIDUAL participants: an additional refreshment area will be available to place personal refreshments on the Courses and at the T24 Village.
On the T24 Challenge, depending on the discipline, you have equipment guidelines:
For swimming:
Mandatory: Wetsuit (if the water is <16°C) and swim cap
Prohibited: Fins, snorkels, flotation devices, and propulsion systems
Advised: Suitable goggles, petroleum jelly
For cycling:
Mandatory: Helmet, non-flashing front and rear lights (for night), yellow or orange photo-reflective vest
Prohibited: Electric bike, headphones
Advised: Windproof clothing, goggles, gloves
For running:
Prohibited: Headphones
Advised: Suitable shoes, cap, goggles, windproof clothing
Your registration includes:
Your participation and insurance
Race bib and timing chip
Technical t-shirt
Swim cap
Training schedule
Video archive
T24 deals
24-hour refreshments
Massages by physiotherapists
Recovery area
Bicycle repairs
Finisher medal
Besides complying with sports, safety, cleanliness rules, and organizer instructions, it is mandatory that you complete at least one loop in each of the three disciplines.
Once this condition is met, each participant is free to adapt their strategy.
There is a common scoring system for the event:
1 km of swimming: 15 points
1 km of cycling: 1 point (example: a 23 km loop = 23 points)
1 km of running: 4 points (example: a 4.5 km loop = 18 points)
For the clever ones, there are even bonus points! 10 bonus points are awarded for the best times in the three disciplines and the 11 challenges. To learn more about how the bonus points work, click here!
If you still have questions, you can contact the organizers through the following link: https://www.t24-xtremtriathlon.com/contact
To become a volunteer for this race, you need to send your application to the following link: https://www.t24-xtremtriathlon.com/benevoles
You can check the race rules here
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