Determining that this fort was no longer needed after the end of the Indian Wars, the US Army closed and abandoned it.

The following year, the US Army defeated and captured the Nez Perce band of Chief Joseph in the Battle of Bear Paw.

They supported the flank of Roosevelt's "Rough Riders" at the Battle of San Juan Hill in 1898 in Cuba.

From the late 19th century, the extensive lands of Fort Assiniboine served as a refuge for bands of landless Chippewa and Cree people, who camped within the military reservation.

By the early twentieth century, the Indian Wars were finished and the Army determined it no longer had a need for Fort Assiniboine.

At the same time, Chippewa leader Asiniiwin (Rocky Boy) appealed to the Theodore Roosevelt administration for land and education for his band, who had been pushed out of their traditional territory further east.

A handful of surviving structures have been adapted for use as both an agricultural research station associated with Montana State University - Bozeman, and as a historical preservation site.

A portion of the Reservation, where the beaver creek ran through the Bears Paw Mountains, was first designated as a national park.

When they failed to use it, the Reservation transferred the land to Hill County, which created Beaver Creek Park.

The Havre Chamber of Commerce and the Hill County Museum both furnish current visitor information.