From October to December 2026, the Paris - Vallée de la Marne Agglomeration invites residents to participate in a series of free environmental activities. These events, led by local associations supported by the Climate Air Energy Territorial Plan (PCAET), cover a wide range of themes: nature walks, culinary and creative workshops, discovery of local fauna and flora, and awareness of eco-friendly practices.
In October, participants can explore the world of bees with visits to educational apiaries in Chelles (Saturday, October 3, 9 AM-12 PM) and Pontault-Combault (Saturday, October 3, 10 AM-12 PM). A walk along the ponds between the RER stations of Lognes and Torcy (Saturday, October 3, 2:30 PM-5 PM) will address air quality issues, with real-time measurements. Observing nocturnal species and bats is scheduled for Friday, October 9 (7:45 PM-10 PM) on the Bords de Marne. Creative workshops include making soy wax candles in Chelles (Saturday, October 10, 2 PM-4 PM) and creating an autumn clay artwork in Roissy-en-Brie (Thursday, October 22, 10 AM-12 PM). Tasting forest products like honey and chestnuts is offered in Vaires-sur-Marne (Saturday, October 17, 9 AM-12 PM). Finally, a walk in the Ferrières forest in Roissy-en-Brie (Sunday, October 25, 9 AM-12 PM) will explore the impacts of climate change.
November begins with the discovery of the biodiversity of a protected pond in Croissy-Beaubourg (Saturday, November 7, 10 AM-12 PM), followed by an exploration of the landscapes and scents of the Célie forest in Pontault-Combault (Sunday, November 8, 9 AM-12 PM). A workshop on building insect hotels will be held in Chelles (Wednesday, November 11, 9 AM-12 PM). Making beeswax candles is offered in Lognes (Wednesday, November 11, and Saturday, November 21, 2 PM-5 PM). The transformation of urban ponds into ecological corridors will be discussed between Lognes and Torcy (Saturday, November 14, 10 AM-12 PM). A forest walk in Bois de la Grange in Champs-sur-Marne (Wednesday, November 18, 1:30 PM-3 PM) will focus on preserving forest environments. In Lognes, an art workshop will allow participants to create insects from ink blots (Wednesday, November 18, 2:30 PM-5 PM). Culinary workshops on honey muffins and edible flower shortbread will take place in Chelles (Saturday, November 21, 2:30 PM-4 PM), while observing forest birds is scheduled in Vaires-sur-Marne (Saturday, November 28, 9 AM-12 PM). Crafting Christmas wreaths from natural elements is offered in Chelles (Saturday, November 28, 2 PM-4 PM).
In December, activities continue with the creation of Christmas wreaths in Chelles (Saturday, December 5, 2 PM-4 PM) and making festive characters from recycled materials in Lognes (Wednesday, December 2, 2 PM-4:30 PM). Discovering small carnivorous mammals of the region is offered in Chelles (Wednesday, December 9, 9 AM-12 PM). The ecosystem of the Coq pond in Roissy-en-Brie will be presented (Wednesday, December 9, 10 AM-12 PM). Birdwatching at the Vaires-sur-Marne water body and Torcy leisure center is scheduled for Saturday, December 19 (9 AM-12 PM). Finally, a walk in Torcy (Wednesday, December 30, 9 AM-12 PM) will explore fauna, flora, and urban adaptations designed to accommodate them.
