On Wednesday, September 30, 2026, the “Tous en Forêt” event returns for its sixth edition in Île-de-France. A day to meet the ONF foresters and explore the issues of forest management, with more than 40 participating forests across the region.
Climate change, forest management, biodiversity protection, timber exploitation… Questions about the future of forests and how to safeguard them are plentiful. To tackle them, foresters from the National Forest Office are stepping up through the event Tous en Forêt, making a comeback for a 6th edition in Île-de-France, on Wednesday, September 30, 2026.
They invite you to come and talk to them during this initiative, which takes place in the state, municipal and regional forests of the Paris region. It's a unique opportunity to put your questions directly to those who are working to preserve our natural spaces, and understand the challenges of tomorrow.
The program in the Île-de-France region is particularly rich, with rendezvous points spread throughout the state-owned and regional forests. Each meeting point offers a guided tour with explanations suitable for all ages.
Note that most events do not require reservation, with the exception of certain tours. To sign up, simply click the links below!
Which forests are taking part in Tous en Forêt 2026 in Île-de-France?
Seine-et-Marne (77)
- Armainvilliers State Forest
Date : Saturday, September 26, 2026, from 2:00 PM to 4:00 PM
Location : meet in front of Anne Frank Primary School, Avenue du Maréchal Juin, 77330 Ozoir-la-Ferrière
Activity : guided walk with ONF foresters, exploring forest management, biodiversity, climate change, and forest uses.
- Villefermoy State Forest
Date : Saturday, September 26, 2026, from 2:00 PM to 4:00 PM
Location : 8 Routes welcome area, D213, 77370 Fontenailles
Activity : cycling tour with ONF foresters along paved forest roads. Mountain bikes and city bikes allowed, ages 10 and up.
- Ferrières Regional Forest
Date : Wednesday, September 30, 2026, from 2:00 PM to 5:00 PM
Location : Maison de la Nature, 3 Allée du Château d'Eau, 77164 Ferrières-en-Brie
Activity : 3–4 km guided walk focused on forest management and the new Integral Biological Reserve of Buronnières.
Yvelines (78)
- Versailles State Forest
Date : Wednesday, September 30, 2026, from 2:00 PM to 4:00 PM
Location : Parking at Étang de la Geneste
Activity : Guided walk with foresters to peek behind the scenes of forest management.
- Rambouillet State Forest
Date : Wednesday, September 30, 2026, from 2:00 PM to 4:00 PM
Location : two meeting points: Étang d'Or, in front of Huttopia, and the Mares Gautier post at Saint-Léger-en-Yvelines
Activity : Guided strolls with foresters around forest management and the future of the forest.
- Saint-Germain State Forest
Date : Wednesday, September 30, 2026, from 2:00 PM to 4:00 PM
Location : two meeting points: Étang du Corra and Mare aux Canes
Activity : Guided walks with foresters on management, biodiversity, and forest uses.
- Marly State Forest
Date : Wednesday, September 30, 2026, from 2:00 PM to 4:00 PM
Location : Étoile Magnifique
Activity : A narrated stroll with ONF foresters to better understand their work and the massif’s management.
- Port-Royal State Forest
Date : Wednesday, September 30, 2026, from 2:00 PM to 4:00 PM
Location : Manet Parking
Activity : Guided walk with foresters focused on forest management, biodiversity, and adapting to climate change.
Essonne, France (Department 91)
- Sénart State Forest – Faisanderie
Date : Saturday, September 26, 2026, 2:00–4:00 PM
Location : Faisanderie de Sénart – Forest Education Center, 91450 Étiolles
Activity : a guided walk with foresters, discussing climate change, biodiversity, timber harvesting, hunting, and welcoming the public.
- Verrières State Forest
Date : Wednesday, September 30, 2026, 2:00–4:00 PM
Location : Roundabout of the Obelisk
Activity : a guided woodland walk with foresters to explore the challenges of managing forests in Western Île‑de‑France.
- Dourdan State Forest
Date : Wednesday, September 30, 2026, 2:00–4:00 PM
Location : Nemours intersection
Activity : a guided walk with foresters focusing on forest management and preservation.
- Palaiseau State Forest
Date : Wednesday, September 30, 2026, 2:00–4:00 PM
Location : Parking lot at Chemin de la Hunière
Activity : a guided walk with foresters about daily work and conservation priorities for the massif.
- Sénart State Forest – Montgeron Junction
Date : Wednesday, September 30, 2026, 2:00–4:00 PM
Location : Parking at the Montgeron junction, 91230 Montgeron
Activity : a meet-and-walk with foresters exploring biodiversity, climate change, tree management, and the forest’s multiple uses.
Hauts-de-Seine (92)
- Meudon National Forest
Date : Wednesday, September 30, 2026, from 2:00 to 4:00 PM
Location : at the Tour junction
Activity : guided walk with the forest rangers to uncover how the massif is managed.
- Fausses-Reposes National Forest
Date : Wednesday, September 30, 2026, from 2:00 to 4:00 PM
Location : lawn by the Vieil Étang, Route des Bassins
Activity : guided walk with the foresters about management, biodiversity, and the forest’s adaptation to climate change.
- La Malmaison National Forest
Date : Wednesday, September 30, 2026, from 2:00 to 4:00 PM
Location : Saint-Cucufa parking
Activity : guided walk with the forest rangers exploring the forest’s management and preservation challenges.
Seine-Saint-Denis, Department 93
- Maubué Regional Forest — Bois Saint-Martin
Date : Wednesday, September 30, 2026, from 2:00 PM to 5:00 PM
Lieu : Entrance to Bois Saint-Martin, 14 Avenue du Bois Saint-Martin, 93160 Noisy-le-Grand
Activité : guided stroll with foresters, a mini-exhibition on the history of Bois Saint-Martin, discussions on its management and biodiversity, followed by a quiz and activities.
Val-de-Marne (94)
- La Grange National Forest
Date : Saturday, September 26, 2026, from 2:00 PM to 4:00 PM
Location : Étoile de Bellevue, parking on Allée des Tilleuls, 94440 Villecresnes
Activity : a walk and a chat with foresters about forest management, biodiversity, timber harvesting, and climate change.
- La Forêt domaniale de Notre-Dame
Date : Saturday, September 26, 2026, from 2:00 PM to 4:00 PM
Location : Parking near Marmousets Castle, Chemin des Marmousets, 94510 La Queue-en-Brie
Activity : a guided walk and discussions with foresters on biodiversity, forest management, and climate-change adaptation.
- Regional Woods of Le Plessis-Saint-Antoine
Date : Wednesday, September 30, 2026, from 2:00 PM to 4:00 PM
Location : near the intersection of Avenue Aubry and Avenue Lefèvre, 94420 Le Plessis-Trévise
Activity : a two-hour guided walk focused on woodland management, renewal, and the preservation of wildlife and flora.
Val-d'Oise (95)
- Carnelle State Forest
Date : Wednesday, September 30, 2026, from 2:00 PM to 4:00 PM
Location : Pas de la Vache junction, Carnelle Ponds parking lot
Activity : Guided walk with forest rangers on forest management and preservation.
- Isle-Adam State Forest
Date : Wednesday, September 30, 2026, from 2:00 PM to 4:00 PM
Location : Obelisk crossroads
Activity : Guided walk with foresters on the massif’s management challenges and its adaptation to climate change.
- Montmorency State Forest
Date : Wednesday, September 30, 2026, from 2:00 PM to 4:00 PM
Location : Two meeting points: Château de la Chasse and the Four Cedar Crossroads
Activity : Guided walks with forest rangers to understand forest management and preservation.
- Boissy Regional Wood
Date : Wednesday, September 30, 2026, from 2:30 PM to 4:30 PM
Location : Southeast entrance of Boissy Wood, 189 Jules César Avenue, 95130 Franconville
Activity : Meet Île-de-France Nature teams to discuss wood management, wildlife and flora, forest regeneration, and current projects.
The perfect event to reconnect with nature. Meet on Wednesday, September 30 at one of the many sites offered in Île-de-France... and sometimes even a few days earlier!
