The Rocky Flats National Wildlife Refuge is 5,237-acre (21.19 km2) National Wildlife Refuge in the United States, located approximately 16 miles (26 km) northwest of Denver, Colorado. The refuge is situated west of the cities of Broomfield and Westminster and situated north of the city of Arvada.

Broomfield is a consolidated city and county located in the U.S. state of Colorado. It has a consolidated government which operates under Article XX, Sections 10–13 of the Constitution of the State of Colorado. Broomfield's population was 74,112 at the 2020 United States Census, making it the 15th most populous municipality and the 12th most populous county in Colorado. Broomfield is a part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area and the Front Range urban corridor.