Rivière du Sud is a river located in the province of Quebec, Canada. It flows through the Montérégie region and is a tributary of the Saint Lawrence River. The river is known for its scenic beauty and is surrounded by various natural landscapes, making it a popular spot for outdoor activities. The river's watershed supports diverse ecosystems and is home to various species of fish and wildlife. It plays a significant role in the local environment and contributes to the area's recreational opportunities, including fishing, kayaking, and hiking along its banks.