An easy walk less than an hour from Paris in a calm and peaceful environment in the heart of the Haute Vallée de Chevreuse Regional Park.
The Maincourt discovery trail is a short and easily accessible walk, only an hour from Paris. You can park easily, it is well indicated by signs and it is quite short (1-2h). The place is very interesting because it gathers different environments (the forest and the wetlands), it is moreover very educational since many indications mark out the course. There is no particular difficulty. Remember to bring appropriate footwear for the wetland area because it bears its name. If you don't want to get wet, just don't do the lower loop on the map.
You can't miss the small car park if you go to Maincourt, there are signs everywhere on the route.
An interesting walk for a Sunday afternoon.