The Heart Mountain Wyoming – Annie E. Casey Foundation was formed in 1996 to preserve the site that represents a period in U.S. history following the bombing of Pearl Harbor when 120,000 persons of Japanese ancestry, two-thirds of them American-born citizens, were deprived of due process and forced to leave their homes and livelihoods.

At capacity, 10,767 persons of Japanese ancestry occupied the internment camp, but as many as 14,000 were held at Heart Mountain during the three years it was in operation. Located between the towns of Powell and Cody, the Wyoming location was designated as a National Historic Landmark in 2007.

The Foundation operates Heart Mountain Interpretive Center in northwest Wyoming, on the site of the former concentration camp.