Fort Owen served as an important trading hub for Western Montana for over 20 years. However, when the Mullan Road was built in 1863, connecting Fort Benton to Walla Walla, Washington, it became the main transportation route and bypassed Fort Owen, going north through Missoula instead. This property has passed through many hands, one acre surrounding the remains of the fort was given to the Fort Owen Historical Association in 1937. In 1956 they conveyed it to the state of Montana for one dollar.

In addition to its many firsts, it also was the first recorded land transaction in Montana and contains the oldest constructed buildings in the State of Montana. Today you can tour one of the barracks that served as John Owen’s home and library, see the outline of the fort’s walls, a reconstructed root cellar, the well-house and a historic cabin. The rooms in the east barracks feature period furnishings and artifacts and visitors will find interpretive signs and exhibits which detail the region's history.