The Cowan River is a river located in New South Wales, Australia. It flows through the Cowan Creek area and is part of the Hawkesbury-Nepean River system. The river is known for its scenic beauty and is a popular spot for recreational activities such as fishing, kayaking, and bushwalking. The Cowan River is surrounded by lush bushland and offers a habitat for various wildlife species. It is also significant for its historical importance to the local Indigenous communities, who have lived in the region for thousands of years. The river contributes to the ecological diversity of the area and supports local ecosystems.