The Ventura River watershed is a natural area in southern California that collects and drains water from the surrounding land into the Ventura River. This watershed covers approximately 300 square miles and includes various ecosystems, such as forests, grasslands, and wetlands. It plays a crucial role in supporting local wildlife and providing water resources for nearby communities. The watershed is fed by several tributaries and is vital for flood control and water supply. It also contributes to the health of the Santa Barbara Channel, where the river meets the ocean. Conservation efforts are important to protect this valuable ecosystem and its biodiversity.