Fort Deseret, Adobe fort in Millard County, Utah.

Fort Deseret is a 550-foot square adobe fort with 10-foot walls, built in 1865 just south of Deseret in Millard County, Utah. It was raised during the Black Hawk War to shelter settlers, and in 1866 it held when Black Hawk came to Deseret demanding cattle. The site was listed on the National Register of Historic Places on October 9, 1970.

Mormon settlers constructed this fort in 1865 during the Black Hawk War when the US Army was preoccupied with the Civil War. It was built as a direct response to conflicts in the region that threatened settler communities.

The fort's name comes from Deseret, the name Mormon pioneers gave their proposed state, drawn from a Book of Mormon word for honeybee. When Black Hawk came to Deseret in 1866 demanding cattle, the settlers took refuge behind these walls, and the standoff ended in a negotiated peace rather than a fight.

The fort sits about 1 mile south of Deseret town alongside Highway 257 and is straightforward to locate. It operates as an undeveloped state park with minimal facilities, maintained by community volunteers who keep the grounds accessible.

The fort's walls were made of adobe, and the structure was listed on the National Register of Historic Places on October 9, 1970. The 550-foot square enclosure with 10-foot walls was built in 1865 by local settlers who were advised to defend themselves while the U.S. Army was occupied in the Civil War.