No special access issues
🅿️ Park at parking close to Maison Forestiere. Walk with Route de la Fountaine around 100m and take a right at a green water fountain ⛲. Follow this path until you come to a cross road. At this point you will see the beginning of the Red, blue, Orange and yellow circuit at your right. For the Eastern parts you can also park on the secondary parking.
It's also "only" a 2km walk away from the train station of Avon/Fontainebleau. So it's extremely good for people without a car.