Fête de Igny
The Festi'Vallée d'Igny, an unmissable annual festival in the Bièvre valley
2026
About Festi'Vallée d'Igny
The Festi'Vallée d'Igny is the town's flagship annual festival, co-organised by the town hall and the entertainment committee. Every September, over 10,000 festival-goers gather for two days of concerts, children's entertainment, an artisan village, a varied food offering, and an evening fireworks display. A popular and friendly event in the beautiful Bièvre valley.
Festi'Vallée d'Igny — edition 2026
The Festi'Vallée d'Igny takes place on Saturday, September 12 and Sunday, September 13, 2026, at Parc Saint-Nicolas, Avenue Jean Jaurès, across from the RER station. The program includes the Trifouillette and Trifouillette Kids races, an artisan and gourmet market, a bouncy castle area, Festi'Resto meals by reservation, and a concert and fireworks show on Saturday night.
Festi'Vallée d'Igny 2026
The Igny organizing committee and the city are hosting the Festi'Vallée on Saturday, September 12 and Sunday, September 13, 2026, at Parc Saint-Nicolas, Avenue Jean Jaurès. The site is open from 10:00 AM to midnight on Saturday and from 10:00 AM to 6:30 PM on Sunday. Entry is located across from the RER station until 8:00 PM on Saturday, then directly through the meadow.
The Trifouillette Races
Trifouillette Kids kicks off the weekend on Saturday morning with three starts: the Init Trail at 11:00 AM (2,900m), La M at 11:30 AM (1,500m), and La Bambinade at 11:45 AM (500m). Registration is €8 online via Billetweb and €10 on-site on Saturday morning.
On Sunday, the Trifouillette celebrates its 11th edition with four distances: 27km, 17km, 10km, and 5km. The 2026 addition is a duo relay for the 27km race, split into 17km and 10km legs, limited to 20 teams. Starts run from 9:15 AM to 11:00 AM, with a 1:00 PM cutoff. Online registration closes at midnight on Thursday, September 10; no on-site registration is available for these races.
On-site
The artisan and gourmet market, a large play area with bouncy castles, and several food stalls will occupy the meadow throughout the weekend. Festi'Resto serves a dinner under a marquee on Saturday night and a paella lunch on Sunday, both by reservation. The "Igny has talent" competition, open to those 8 and older, also takes place on-site. On Saturday night, a concert precedes the fireworks.
Getting here and parking
Parc Saint-Nicolas is located across from the Igny RER station, just a few dozen meters from the entrance. On-site parking is limited: the Place François Collet (70 spots, 500m from the entrance), the Verrières golf course parking lot, and the Stade Jean Moulin are recommended by the organizers. An unsupervised bike rack is available near the entrance.
Pending announcements
The "Le Live" music festival lineup and the exact time for the fireworks were not yet published as of mid-August 2026. The organizing committee will post the hour-by-hour program on igny-animation.fr.
Highlights Festi'Vallée d'Igny 2026
- Fireworks display on Saturday night.
- The Trifouillette on Sunday: 27km, 17km, 10km, and 5km races, featuring a new duo relay for the 27km distance in 2026.
- Trifouillette Kids on Saturday morning: three races (500m, 1,500m, and 2,900m) starting between 11:00 AM and 11:45 AM.
- Artisan and gourmet market and bouncy castle area open both days.
- Festi'Resto: Saturday night dinner and Sunday lunch paella, reservation required.
Programme Festi'Vallée d'Igny 2026
Saturday, September 12, 2026 — 10:00 AM to Midnight
- 10:00 AM — Site opens at Parc Saint-Nicolas, Avenue Jean Jaurès. Access via the RER station entrance until 8:00 PM, then directly through the meadow.
- 10:00 AM — Trifouillette Kids: Bib pickup and last-minute on-site registration at the Trifouillette village.
- 11:00 AM — Init Trail start: 2,900m, 50m elevation gain, trail running initiation in the Plaine d'Amblainvilliers and Bois de Verrières-le-Buisson. For those born between 9/1/2012 and 8/31/2015.
- 11:30 AM — La M start: 1,500m, 30m elevation gain, around Parc Saint-Nicolas with a stretch along the edge of the Bois de Verrières. For those born between 9/1/2015 and 8/31/2018.
- 11:45 AM — La Bambinade start: 500m within and around the park, each child must be accompanied by a parent. For those born between 9/1/2018 and 8/31/2021.
- 2:00 PM to 6:30 PM — Bib pickup for Sunday's Trifouillette at the stand at the bottom of Parc Saint-Nicolas.
- 7:30 PM to 10:00 PM — Festi'Resto: Dinner under the marquee, reservation required. €22 for adults, €11 for children under 12 (half-portion).
- Evening — Concert followed by fireworks. Bands and exact times to be announced.
- Midnight — Site closes.
Sunday, September 13, 2026 — 10:00 AM to 6:30 PM
- 8:00 AM — Trifouillette bib pickup opens at the bottom of Parc Saint-Nicolas. Closes at 9:00 AM for the 27km, 9:30 AM for the 10km and 17km, and 10:00 AM for the 5km.
- 9:00 AM to 1:30 PM — Childcare for ages 3 and up near the start area. €10 per child, 20 spots available.
- 9:15 AM — Start of the 27km solo and 27km duo relay. 630m elevation gain, two loops along the Bièvre and through the Bois de Verrières. The relay (17km then 10km, passing Chemin du Pré Monseigneur) is new for 2026, limited to 20 teams.
- 10:00 AM — Site opens to the public.
- 10:15 AM — 17km start: 400m elevation gain, loop via the Bièvre path, the old town of Igny, and the Bois Brûlés.
- 10:45 AM — 10km start: 200m elevation gain.
- 11:00 AM — 5km start: 70m elevation gain, walking permitted.
- 12:30 PM to 3:00 PM — Festi'Resto: Paella lunch under the marquee, reservation required. €18 for adults, €10 for children under 12 (half-portion).
- 1:00 PM — 27km time limit cutoff (4 hours 45 minutes).
- 6:30 PM — Site closes.
Ongoing throughout the weekend
- Artisan and gourmet market
- Large play area with bouncy castles
- On-site catering
- "Igny has talent" competition, open to ages 8 and up, register online with the organizing committee.
- For Sunday runners: bag drop, refreshment stations at the Stade des Bois Brûlés and Chemin du Pré Monseigneur, massage and podiatry tent at the Trifouillette village.
As of mid-August 2026, the "Le Live" music festival lineup and the fireworks schedule have not yet been released.
Prices Festi'Vallée d'Igny 2026
Trifouillette (Sunday, September 13): 5km €10 · 10km €14 · 17km €19 · 27km €29 · Duo relay €33, plus a €1.50 registration fee per runner (€1.75 for the 27km and relay). A €10 discount per group of 10 or more runners is available for clubs and companies (excluding the 5km).
Trifouillette Kids (Saturday, September 12): €8 online, €10 on-site on Saturday morning.
Childcare during the Trifouillette: €10 per child, for ages 3 and up.
Festi'Resto, by reservation: Saturday dinner €22 for adults and €11 for children under 12 · Sunday paella lunch €18 for adults and €10 for children under 12.
Practical information — Festi'Vallée d'Igny
Practical Information
Location
Prairie de Saint-Nicolas, 14 avenue Jean-Jaurès, 91430 Igny.
Access
By RER: RER C, Igny station.
By car: Prairie de Saint-Nicolas, 14 avenue Jean-Jaurès, 91430 Igny.
By bike: Bièvre valley cycle path.
Hours
Saturday from 10 AM to midnight — Sunday from 10 AM to 6:30 PM.
Admission
Free admission for most activities.
Contact
Igny Town Hall: 01 69 33 11 19
Official website: igny.fr
Entertainment Committee: igny-animation.fr
The Festi'Vallée d'Igny: the great festival of the Bièvre valley
The Festi'Vallée is the unmissable annual festival of the town of Igny (91430), a green commune in the Bièvre valley in Essonne. Co-organised by the town hall and the municipal entertainment committee, this event welcomes over 10,000 festival-goers over two days each year, making it one of the most important popular gatherings in the Paris-Saclay area.
Two days of celebration for all audiences
The Festi'Vallée takes place every year in September, marking the end of summer in the most beautiful way. The program, carefully prepared by the organisers, is designed to satisfy all generations and desires.
On Saturday, festivities open at 10 AM with the Trifouillette kids, a morning of entertainment specially dedicated to the youngest, then stretch until midnight with a dense musical program. The highlight of the evening is a fireworks display that illuminates the valley and brings together spectators of all ages in shared wonder.
Sunday in turn opens with the Trifouillette adulte, a sporty and friendly morning, before continuing with concerts, entertainment, and the artisan village until 6:30 PM. The relaxed atmosphere of Sunday afternoon contrasts pleasantly with the effervescence of Saturday evening.
Concerts: the centrepiece of the program
The musical program of Festi'Vallée is one of the event's great strengths. Each edition offers several concerts covering a wide musical spectrum: rock, French chanson, pop, world music. Local bands perform alongside regional or national artists, in a spirit of discovery and accessibility that reflects the values of the event. The main stage of Festi'Vallée is a springboard for many artists from Essonne.
The Artisan Village
One of the unique features of Festi'Vallée is its artisan village, which hosts local and regional creators. Jewelers, ceramists, makers of artisanal food products, textile designers: the village stands allow visitors to discover and acquire unique products while supporting local craftsmanship. This ephemeral market is particularly appreciated by residents concerned with responsible consumption and connection with producers.
Catering: a gourmet and diverse offering
The Festi'Vallée offers a particularly comprehensive catering selection. Local associations run stands, providing opportunities to taste various specialties while supporting local community life. Food trucks complement the offering with world cuisine proposals. The conviviality of meals shared with family or friends is one of the essential dimensions of the event.
Igny: a town committed to its festive traditions
The town of Igny, nestled in the Bièvre valley, is a human-sized commune that carefully cultivates its associative fabric and cultural life. The entertainment committee, a historical partner of the town hall, plays a central role in organising the Festi'Vallée and many other events throughout the year. This collaboration between the municipality and the associative world guarantees an event rooted in the realities and aspirations of the population.
Where does it take place — Festi'Vallée d'Igny
Festi'Vallée d'Igny in brief
History of Festi'Vallée d'Igny
Edition 2025 Sep 2025Other festivals near Igny
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