Tualatin River National Wildlife Refuge is an 1,856-acre protected wetland and lowland landscape in northwestern Oregon near Portland, established in 1992 after a local campaign led by Sherwood resident Jim Claus. Beginning with small donated parcels and expanding through federal funding in the 1990s, it transformed former farmland into restored seasonal wetlands with water-control systems and dikes. Stretching about ten miles along the Tualatin River, Rock Creek, and Chicken Creek, it is one of only ten urban national wildlife refuges in the United States. On the Pacific Flyway, it supports nearly 200 bird species and large winter gatherings of waterfowl while also serving conservation, restoration, and public education.