The Onkaparinga River is located in South Australia, flowing through the Adelaide Hills and into the Gulf St Vincent. It stretches approximately 145 kilometers and is known for its scenic beauty, featuring diverse landscapes, including wetlands and cliffs. The river is an important natural resource for the surrounding communities and supports various recreational activities. The river's catchment area is home to numerous species of flora and fauna, making it a vital ecosystem. The Onkaparinga River National Park protects parts of the river, offering walking trails and picnic spots for visitors. This area is popular for birdwatching and enjoying nature.