The Chevreuse River is a small river located in the Île-de-France region of France. It flows through the Chevreuse Valley, a picturesque area known for its natural beauty and historical significance. The river is approximately 30 kilometers long and is a tributary of the Yvette River. The Chevreuse River is popular for outdoor activities such as hiking and cycling, with many trails following its banks. The surrounding landscape features charming villages and historic sites, making it a favored destination for both locals and tourists seeking to explore the scenic countryside.