4.9
+4.5K avisThe 100k Road Race is a unique discipline in the world of running. It requires rigorous mental strength and a strict race strategy. Little known to the general public, this race format nevertheless attracts a passionate and constantly progressing community. We'll introduce you to this extraordinary and very exclusive discipline!
100k Race: History of the Discipline
Before learning more about this particularly impressive race format, a look back at its relatively recent origins.
🧐 Where does the 100k race come from?
The ultramarathon, of which the 100k race is one of the flagship distances, originated in the early 20th century. But it was from the 1980s that the event became structured, notably thanks to official recognition by the IAU (International Association of Ultrarunners) and later by World Athletics.
However, it does not become an Olympic sport. That significantly limits its growth since the financial stakes and professionalization of the 100k runners are limited.
Currently, about fifty 100k races are labeled by the IAU out of the 400 existing races worldwide.
😶🌫️ An International Popularization with Mixed Results
The 100k race is experiencing strong development in Japan — with the famous Lake Saroma — as well as in Europe. Thus, France was long the country with the most races of this format, with 29 in 1991 and 14 in 2003.
Starting in 1987, World Championships have been organized annually, promoting the rise of a true international elite, particularly in Russia and Japan. But no miracle, however: the discipline remains among the most exclusive in athletics.
In terms of performances, the world records are currently held by:
Aleksandr Sorokin (Lithuania) in 6 hours 05 minutes and 41 seconds (2022)
Tomoe Abe (Japan) in 6 hours 33 minutes and 11 seconds (2000)
How to prepare for a 100k?
The 100k road format is particularly physically and mentally demanding. It requires a well-constructed plan and mental preparation work.
💡 The Technical Specifics of the 100k Race
The 100k road race is an event of pure endurance. Most often run on a 5 to 10 kilometer loop repeated many times, it requires particularly precise race management: hydration, nutrition, and pace must be skillfully orchestrated. Not to mention mental preparation! Imagine running a course of a few kilometers for hours: it can quickly become a challenge within the challenge if you haven't prepared for it.
Indeed, the effort can last between 6 hours for the best and 12 hours for amateurs. Concretely, it’s a distance that requires tailored training, which can in some aspects resemble a marathon training… with “a few” more kilometers on the clock!
Finally, if progression is king in running, it becomes the empress in the 100k. The road is a particularly demanding terrain for your feet, your joints, and more generally your body. Enduring the impacts generated by each step for hours cannot be improvised. Cramps, digestive issues… Your worst enemies lie in wait on the big day if you don't take the time to acclimate your body to this unique type of effort.
👉 The Key Workouts for a 100k Preparation
The base endurance: still crucial! With the mileage volume you will need to accumulate to be ready on the big day, easy runs are more than ever indispensable. Some will be particularly long, approaching the long run of a marathon training.
The 30' and 60' threshold workouts: we build a good resistance base. Depending on your level, the 100k is run at a pace more or less close to your base endurance pace. For elites and experienced runners on the distance, we approach a Tempo pace. Threshold workouts will help you work on your resistance, especially for the end of the race. They will help you build a good endurance base while working on your mental strength.
The long runs: prepare yourself to wear down the asphalt! To become a 100k runner, you must… set limits. A lot. It is spread throughout the week but the peak is placed on the long runs. Some plans include “shock weekends” to spread the mileage over two consecutive days. Elites even habitually structure an official marathon with a big warm-up easy run and a long recovery, nothing less. In the specific preparation phase, these runs will include segments at your target pace to familiarize yourself with it and tackle it with some existing fatigue in your legs. Of course, they will be an opportunity to test your fueling plan.
The specific pace workouts: the end is near! Placed in the final training block, these workouts allow you to lock in your target speed. Don't panic if it sometimes seems difficult to maintain: you'll be more rested on race day! However, it's not a marathon: it should feel more accessible over long intervals than your pace on the actual distance.
The strength & conditioning: did you think we forgot it? Never ! We said it: the 100k race is very traumatic for your body. You must work your muscles to prepare them to withstand such intense effort. You will not escape it.
Who are the French specialists in this discipline?
Despite its confidential nature, the 100k road includes champions among whom the French hold a place of honor!
👸 Floriane Hot: the queen of the 100k
Floriane Hot establishes herself today as one of the major figures in the 100k race worldwide. World champion in 2022 in Berlin with a time of 7 hours 04 minutes and 03 seconds — European record and French record — she recurs in 2024 in Bengaluru, India, under difficult climatic conditions (heat and humidity), with a time of 7 hours 08 minutes and 43 seconds. That after a pregnancy carried out over the year 2023.
This double performance places the Frenchwoman at the top of the discipline. Her consistency, race management, and Mental strength are impressive. She is also the cornerstone of the French women's team, which won the collective world title alongside her in 2022 and 2024.
Moreover, her iconic smile and her almost inexhaustible charm make her popular with a wide audience, helping to shed light on her flagship discipline.
🇫🇷 Guillaume Ruel: the little prodigy
Guillaume Ruel was only 17 years old when he ran his first marathon. Very quickly, he reveals extraordinary endurance abilities and almost naturally turns to the 100k.
Fun fact? His heart beats 19 times per minute at rest.
In 2024, he set the French distance record with a time of 6 hours 13 minutes and 42 seconds in Los Angeles. On this occasion, he recorded the fifth best worldwide performance of all time.
Workhorse, he chains weeks of training of over 300 kilometers and has managed to surround himself to develop impressive Mental strength. Today, he is under 30 years old and has already left his mark on the history of the discipline.
🚀 Other famous French runners in the discipline
Between 2001 and 2007, the women's 100k in France was dominated by a certain Karine Herry. She who also won the UTMB and the Grand Raid was crowned French champion seven times: a record. We can also mention Réjane Lecamus, Laurence Noël, and Stéphanie Gicquel, the recordwoman of the 24-hour road event.
Among men, Benjamin Polin is gaining popularity and has won the French championships twice in a row in 2022 and 2023. Roland Vuillemenot, on the other hand, holds the record for male French champion titles with five victories between 1991 and 1996.
What are the main 100k races?
🇯🇵 Lake Saroma (Japan)
A historic race created in 1987, it is labeled IAU Gold and has seen several world records broken. Its fast seaside course attracts the best Asian and international runners each year.
🇦🇺 Sri Chinmoy 100k (Australia)
Organized in Canberra, this race welcomes elite and amateur runners each year. Event is certainly demanding, but the organizers take pride in guaranteeing competitors an exceptional experience and an unforgettable atmosphere. Furthermore, the event is approved by the IAU and is on the global calendar.
🇫🇷 100k of Millau (France)
Organized every year in Aveyron, the 100k de Millau are a true institution of long-distance races. It must be said that this is the oldest French race at the distance. The year 2025 marks the 53rd edition of this event, as legendary as it is demanding.
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4.8
+3.5K avisThe 100k road race is an extraordinary, demanding, and fascinating event. Through the exploits of figures like Floriane Hot, it is gaining increasing recognition. For runners as well as athletics enthusiasts, it embodies an extraordinary human and sporting adventure.
Auteur de l’article
Publié le , mis à jour le
In love with running and words, it is with passion that I take up the pen to lead everyone, in their own way, towards the feeling of freedom that only this sport can provide.
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