The De Grey River is located in the Pilbara region of Western Australia. It flows approximately 400 kilometers and is known for its seasonal flow, which can vary significantly depending on rainfall. The river's basin supports diverse ecosystems and is important for local wildlife. The river's name is derived from Sir George Grey, a former governor of the colony of Western Australia. The De Grey River is significant for both its natural beauty and its role in the region's history, providing water resources for agriculture and supporting local communities.