The Hanford Reach National Monument is a national monument in the U.S. state of Washington. It was created in 2000, mostly from the former security buffer surrounding the Hanford Nuclear Reservation. The area has been untouched by development or agriculture since 1943. For this reason, it is considered an involuntary park.
Location: Benton / Grant / Franklin / Adams counties, Washington, USA
Nearest city: Richland, WA
Area: 194,451 acres (78,692 ha)
Created: June 8, 2000
Governing body: U.S. Fish and Wildlife Service U.S. Department of Energy