The Amache National Historic Site, formally the Granada War Relocation Center but known to the internees as Camp Amache, was a concentration camp for Japanese Americans in Prowers County, Colorado. Following the Japanese attack on Pearl Harbor on December 7, 1941, Japanese Americans on the West Coast were rounded up and sent to remote camps.Among the inmates, the notation "亜町 (Amachi)" was sometimes applied.[citation needed] The camp, located 1.3 miles (2.1 km) southwest of the small farming community of Granada, south of U.S. Highway 50, was listed on the National Register of Historic Places on May 18, 1994, and designated a National Historic Landmark on February 10, 2006. On March 18, 2022, U.S. President Joe Biden signed the Amache National Historic Site Act authorizing the Granada War Relocation Center to become part of the National Park System. It will become the third National Historic Site in Colorado after Bent's Old Fort and the Sand Creek Massacre upon land acquisition.
