The Mahwah River is a small waterway located in northern New Jersey, primarily flowing through Mahwah Township. It is a tributary of the Ramapo River and plays a vital role in the local ecosystem, providing habitat for various species of fish and wildlife. The river stretches approximately 10 miles and is known for its scenic beauty, featuring wooded banks and rocky outcrops. It is a popular spot for outdoor activities such as fishing, hiking, and birdwatching, attracting both locals and visitors who appreciate its natural surroundings.