Celebrate a major milestone on Sunday, April 12, 2026, as the Guyancourse hosts its special 30th-anniversary edition. Organized by the Entente Athlétisme Saint Quentin en Yvelines (EASQY), this landmark event takes place in the scenic surroundings of Guyancourt, leading participants through the beautiful Minière ponds and the lush forests of Satory. Whether you are a competitive trail runner, a Nordic walker, or a family looking for a healthy outing, the Guyancourse offers a diverse range of slightly hilly, nature-focused routes. As part of the anniversary celebrations, all adult participants will receive an official technical T-shirt, and every child finisher will be honored with a commemorative medal.
30th Edition Race Categories and 2026 Program
| Race Type | Distance | Key Highlights | Target Audience |
|---|---|---|---|
| Trail Experience | 22 km | UTMB Index; Satory Woods & Versailles views. | Experienced Runners |
| Nature Run | 11 km | Forest trails and lakeside paths. | All Levels |
| Nordic Walk | 14 km | Technically accessible walking route. | Walkers |
| Para-Athletics | 2 km | Inclusive adult race. | Athletes with disabilities |
| Children’s Races | Various | 4 courses; 1 dedicated to adapted sport. | Kids & Juniors |
The Guyancourse 2026 is committed to being an inclusive, eco-responsible, and community-driven event. From the 22km trail—featuring an official UTMB index that circles the historic Pièce d'Eau des Suisses in Versailles—to the various children's races, the organizers at EASQY emphasize the spirit of sharing and personal achievement. Participants are encouraged to register early to take advantage of the anniversary surprises and secure their official 30th-edition gear. With full professional timing, dedicated volunteer support, and a festive race village, the Guyancourse remains a premier destination for trail running in the Yvelines region. Join us for this unique sporting adventure on April 12th!
Apr 12, 2026
Distance — 22K
Type — Running
09:15
€27.00
Apr 12, 2026
Distance — 14K
Type — Running
09:30
€20.00
Apr 12, 2026
Distance — 11K
Type — Running
10:00
€20.00
These values represent the 3-year monthly averages for April in Trappes.
Learn more about the host city, Trappes.
Trappes is a commune in the Yvelines department, Île-de-France region, Northern France. It is a banlieue located in the western outer suburbs of Paris, 26.7 km (16.6 mi) from the centre of Paris, part of the new town of Saint-Quentin-en-Yvelines.
Read more launchWatch highlights and course previews from previous years.
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