The Trail du Josas in Jouy-en-Josas, France, offers something for every runner with distances of 1 km, 1.5 km, 3 km, 5 km, 16 km, 28 km, and 36 km. Courses wind through the scenic Vallée de la Bièvre and surrounding forests, combining natural beauty with a fun, challenging experience. Known for its friendly atmosphere and well-stocked aid stations, the event also features local post-race treats. Whether you’re a beginner or an experienced trail runner, the Trail du Josas promises a memorable day on the trails.
Races
Race Date:
28 March, 2026
The Course sur route 5 km course at the Trail du Josas is primarily on roads. It is run on paved streets and paths within Jouy-en-Josas, making it a fast and accessible course suitable for beginners and runners who prefer road surfaces over trails.
Race Date:
29 March, 2026
The La Calmette 16 km race at the Trail du Josas is a trail course. It primarily follows forest paths, natural trails, and dirt tracks through the surrounding countryside, with only minimal sections on paved paths if necessary. Overall, it is designed as an off-road experience suitable for trail runners.
Race Date:
29 March, 2026
The La Blum 28 km is a challenging trail race in the scenic region of Jouy-en-Josas, France, with an elevation gain of 430 meters. It offers a unique opportunity to explore the natural beauty of the Yvelines area.
Race Date:
29 March, 2026
The Oberkampf 36 km is the longest and most challenging race at the Trail du Josas, designed for experienced trail runners seeking a demanding course. Winding through the scenic forests and hills of Jouy-en-Josas, it combines technical terrain with stunning natural landscapes for a rewarding endurance experience.
Weather based on historical averages.
FAQs
What is the Course sur route 5km?
How long is the Course sur route 5km?
Where does the Course sur route 5km take place?
What is the elevation gain of the Course sur route 5km?
How can I prepare for the Course sur route 5km?
How do I choose the right training plan for the Course sur route 5km?
The Course sur route 5 km course at the Trail du Josas is primarily on roads. It is run on paved streets and paths within Jouy-en-Josas, making it a fast and accessible course suitable for beginners and runners who prefer road surfaces over trails.
The Course sur route 5km is 5km long.
The Course sur route 5km takes place in Jouy-en-Josas, Yvelines, Île-de-France, France.
Runna classifies the Course sur route 5km elevation profile as Flat.
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Course sur route 5km?
The Course sur route 5 km course at the Trail du Josas is primarily on roads. It is run on paved streets and paths within Jouy-en-Josas, making it a fast and accessible course suitable for beginners and runners who prefer road surfaces over trails.
How long is the Course sur route 5km?
The Course sur route 5km is 5km long.
Where does the Course sur route 5km take place?
The Course sur route 5km takes place in Jouy-en-Josas, Yvelines, Île-de-France, France.
What is the elevation gain of the Course sur route 5km?
Runna classifies the Course sur route 5km elevation profile as Flat.
How can I prepare for the Course sur route 5km?
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Course sur route 5km?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the La Calmette 16km?
How long is the La Calmette 16km?
Where does the La Calmette 16km take place?
What is the elevation gain of the La Calmette 16km?
How can I prepare for the La Calmette 16km?
How do I choose the right training plan for the La Calmette 16km?
The La Calmette 16 km race at the Trail du Josas is a trail course. It primarily follows forest paths, natural trails, and dirt tracks through the surrounding countryside, with only minimal sections on paved paths if necessary. Overall, it is designed as an off-road experience suitable for trail runners.
The La Calmette 16km is 16km long.
The La Calmette 16km takes place in Jouy-en-Josas, Yvelines, Île-de-France, France.
The La Calmette 16km elevation gain is 330 meters, which Runna classifies as a Hilly race.
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the La Calmette 16km?
The La Calmette 16 km race at the Trail du Josas is a trail course. It primarily follows forest paths, natural trails, and dirt tracks through the surrounding countryside, with only minimal sections on paved paths if necessary. Overall, it is designed as an off-road experience suitable for trail runners.
How long is the La Calmette 16km?
The La Calmette 16km is 16km long.
Where does the La Calmette 16km take place?
The La Calmette 16km takes place in Jouy-en-Josas, Yvelines, Île-de-France, France.
What is the elevation gain of the La Calmette 16km?
The La Calmette 16km elevation gain is 330 meters, which Runna classifies as a Hilly race.
How can I prepare for the La Calmette 16km?
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the La Calmette 16km?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the La Blum 28km?
How long is the La Blum 28km?
Where does the La Blum 28km take place?
What is the elevation gain of the La Blum 28km?
How can I prepare for the La Blum 28km?
How do I choose the right training plan for the La Blum 28km?
The La Blum 28 km is a challenging trail race in the scenic region of Jouy-en-Josas, France, with an elevation gain of 430 meters. It offers a unique opportunity to explore the natural beauty of the Yvelines area.
The La Blum 28km is 28km long.
The La Blum 28km takes place in Jouy-en-Josas, Yvelines, Île-de-France, France.
The La Blum 28km elevation gain is 430 meters, which Runna classifies as a Moderate race.
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the La Blum 28km?
The La Blum 28 km is a challenging trail race in the scenic region of Jouy-en-Josas, France, with an elevation gain of 430 meters. It offers a unique opportunity to explore the natural beauty of the Yvelines area.
How long is the La Blum 28km?
The La Blum 28km is 28km long.
Where does the La Blum 28km take place?
The La Blum 28km takes place in Jouy-en-Josas, Yvelines, Île-de-France, France.
What is the elevation gain of the La Blum 28km?
The La Blum 28km elevation gain is 430 meters, which Runna classifies as a Moderate race.
How can I prepare for the La Blum 28km?
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the La Blum 28km?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Oberkampf 36km?
How long is the Oberkampf 36km?
Where does the Oberkampf 36km take place?
What is the elevation gain of the Oberkampf 36km?
How can I prepare for the Oberkampf 36km?
How do I choose the right training plan for the Oberkampf 36km?
The Oberkampf 36 km is the longest and most challenging race at the Trail du Josas, designed for experienced trail runners seeking a demanding course. Winding through the scenic forests and hills of Jouy-en-Josas, it combines technical terrain with stunning natural landscapes for a rewarding endurance experience.
The Oberkampf 36km is 36km long.
The Oberkampf 36km takes place in Jouy-en-Josas, Yvelines, Île-de-France, France.
The Oberkampf 36km elevation gain is 580 meters, which Runna classifies as a Flat race.
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Oberkampf 36km?
The Oberkampf 36 km is the longest and most challenging race at the Trail du Josas, designed for experienced trail runners seeking a demanding course. Winding through the scenic forests and hills of Jouy-en-Josas, it combines technical terrain with stunning natural landscapes for a rewarding endurance experience.
How long is the Oberkampf 36km?
The Oberkampf 36km is 36km long.
Where does the Oberkampf 36km take place?
The Oberkampf 36km takes place in Jouy-en-Josas, Yvelines, Île-de-France, France.
What is the elevation gain of the Oberkampf 36km?
The Oberkampf 36km elevation gain is 580 meters, which Runna classifies as a Flat race.
How can I prepare for the Oberkampf 36km?
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Oberkampf 36km?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Trail du Josas or Mairie de Jouy‑en‑Josas. All event details are based on publicly available information and are provided solely to help users discover running events. Runna does not use any official logos, images, or proprietary content from this event or its organiser. Any trademarks or names mentioned are used descriptively to identify the event in a factual manner. For the most accurate and up to date information (including to register or purchase an entry to the event), please visit the Trail du Josas website.
