Since 2018, Agrion de l'Oise has organised the Fête des Mares in Verneuil-en-Halatte. This year, at the initiative of Vern'œil and Les Veilleurs de la Forêt d'Halatte, the 7ᵉ edition becomes the 1ʳᵉ Fête des Mares et des Forêts.

On Sunday 7 June, from 10 a.m. to 6 p.m., a host of associations and institutions will be gathering at the Manoir Salomon de Brosse for a day dedicated to discovering nature. On the programme: stands, events, demonstrations, exhibitions, themed walks and activities for all on the flora and fauna of our region's ponds and forests.

An information-debate on PFASs, the so-called «eternal pollutants», and their effects on health will also be organised by Vern'œil.

Free and open to all (excluding food and drink), the festival will continue the following week with a conference on the flora of ponds, a walk around the ponds of the Halatte forest and new outings on the Biodiversity Trail.

PROGRAMME FOR THE PONDS AND FORESTS FESTIVAL 2026

- 10.00 - Opening of the Festival
- 10.30 - What's that bug? (the Agrion)
- 10:45 - Traces and clues (Les veilleurs de la Forêt)
- 11:00 - Ponds and wetlands (CPIE de l'Oise)
- 11.30am - Taishi demonstration (L'Agrion)
- 11.30am - Living Museum of Nature (Les Veilleurs de la Forêt)
- 11:45 - Un crime au poulailler (Vern'œil)

- 1.45pm - On the road to biodiversity (L'Agrion)
- 2.00 pm - In the footsteps of (Vern'oeil)
- 2.30pm - Ki ki loge à l'Hôtel (L'Agrion)
- 15:00 - Ponds and wetlands (CPIE)
- 15:00 - Information-debate: PFAS and your health (Vern'œil)
- 3.15pm - Children's Safari (Vern'œil)
- 4.15pm - A bit of botany (Vern'oeil)
And, of course, games and activities on the stands, exhibitions and films freely available in the auditorium.
- Thursday 11 June, a day reserved for schools on the path of biodiversity

- Thursday 11 June, 8pm Salle Salomon de Brosse
Lecture by C. Galet on the flora of ponds in our forests«

- Sunday 13 June at 2pm «Halatte forest ponds trail».»