Marrinup Brook is a small watercourse located in Western Australia. It flows through the Marrinup State Forest, providing a natural habitat for various plant and animal species. The brook is part of the local ecosystem and plays a role in maintaining the area's biodiversity. The surrounding area features walking trails and picnic spots, making it a popular destination for outdoor enthusiasts. Visitors can enjoy activities such as hiking and birdwatching while appreciating the scenic beauty of the forest and the tranquil waters of Marrinup Brook.