Set against the picturesque backdrop of Levis-Saint-Nom, France, the Trail des Sources de l'Yvette offers runners an invigorating journey through stunning natural landscapes on September 20, 2026. This event features two distinct routes tailored to various levels of experience and endurance. The shorter option is the "Le p'tit TSY," a 10-kilometer trail that invites participants to explore rolling hills and lush greenery typical of the region. With an elevation gain of just 200 meters, this route provides a scenic yet manageable challenge for runners looking to enjoy the beauty of Levis-Saint-Nom without overexerting themselves. For those seeking a more substantial adventure, the "Le TSY" offers a distance of 21 kilometers and four times the elevation gain at 600 meters. This trail winds through varied terrain, including forests and open fields, delivering an immersive experience that tests both stamina and agility. The route is designed to showcase the rich natural diversity of the area while providing runners with breathtaking views throughout their journey. Both trails are meticulously crafted to ensure a memorable running experience, blending challenging ascents with rewarding descents as participants traverse through serene countryside settings. Whether you're looking for a leisurely run or an intense workout in nature's embrace, Trail des Sources de l'Yvette promises an unforgettable outing amidst the tranquil beauty of Levis-Saint-Nom. The event is not just about the physical challenge; it’s also an opportunity to connect with fellow runners and immerse yourself in the vibrant community spirit that defines such events. With its combination of scenic routes, manageable distances, and supportive atmosphere, Trail des Sources de l'Yvette offers something special for every runner who steps up to take on this unique French trail experience.
Races Offered
10 km
Sep 20, 2026
straighten
Distance —
10K
terrain
Type —
Running
timer
38 days remaining
21 km
Sep 20, 2026
straighten
Distance —
21K
terrain
Type —
Running
timer
38 days remaining
Weather History
These values represent the 3-year monthly averages for September in Levis-Saint-Nom.
thermostatTemperature
12.5° / 20.7°
wb_sunnyFeels like
10.6° / 18.8°
light_mode
Avg sunshine hours
8h 24m
water_drop
Avg rainfall
2.8 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
12.8 km/h (Gentle breeze)
opacity
Sweat loss rate
Moderate
terrain
Course conditions
Firm and slightly soft
sunny
Max UV Index
Moderate (3.5)
humidity_mid
Humidity
77.8%
wb_twilight
Sunrise
07:29
nightlight
Sunset
20:03
About Levis-Saint-Nom
Learn more about the host city, Levis-Saint-Nom.
Lévis-Saint-Nom is a commune in the Yvelines department in the Île-de-France region in north-central France.