Walk in a fairy tale! An easy 3 kilometer (6 km roundtrip) walking path along a charming canal with several quaint residential bridges, from Chevreuse all the way east to St-Remy-les-Chevreuse.
Rent a bike in St-Remy-les-Chevreuse to cruise down the Promenade des Petits Ponts and the area. We haven't been in touch with them, but our guess is that someone there speaks English. The website has a contact page if you want to email ahead.
This is a wonderful activity to do on the way back to Paris on Thursday. Buy tickets in advance! The palace closes at 6:30pm on Thursdays, but the massive park and gardens are open until 8:30pm. Rent a bike. Have a light dinner in the garden restaurant. And be sure to meander over to Marie Antoinette's hamlet.