The Ourcq River is a 97-kilometer-long waterway located in northeastern France. It flows through the Île-de-France region and is a tributary of the Marne River. The river is known for its scenic beauty and is lined with walking and cycling paths, making it a popular spot for outdoor activities. Historically, the Ourcq River played a significant role in the development of the surrounding areas, particularly in Paris. It was used for transportation and trade, contributing to the growth of local industries. Today, it remains an important natural resource and recreational area for residents and visitors alike.