Fort Union Trading Post National Historic Site

Between 1828 and 1867, Fort Union was the most important fur trade post on the Upper Missouri River. Here, the Assiniboine and six other Northern Plains Indian Tribes exchanged buffalo robes and smaller furs for goods from around the world, including cloth, guns, blankets, and beads. A bastion of peaceful coexistence, the post annually traded over 25,000 buffalo robes and $100,000 in merchandise.


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Latitude: 47.99818 Longitude: -104.039845 Elevation: 1877 ft

Hours Open

8:00am to 6:30pm CDT Memorial Day to Labor Day, 9:00am to 5:00pm CDT Labor Day to Memorial Day

Time Period Represented

Upper Missouri Fur Trade, 1828 to 1867.

Seasons Open

Open year round

Visitor Fees

non-fee site

Accessibility Notes

Fort Union Trading Post sits on the Montana/North Dakota border, 25 miles southwest of Williston ND and 25 miles north of Sidney MT. The fort sits on the North Dakota side where the main parking lot is 1/4 mile on the Montana side. There is a slight climb in elevation when coming from the smaller parking lot which is about 500 feet from the fort.

Park grounds are mostly accessible to wheel chairs, but there are some stairs. A ramp to the Bourgeois House Visitor Center will be installed on request and parking lot shuttle service is available for visitors who have difficulty walking. Please have a member of your party contact the ranger at the Visitor Center desk. Video program includes closed captions and narration. A hands-on exhibit of animal pelts is available.

Pet Friendly Notes

Animals need to remain on leash at all times. Service animals are allowed in the visitors center as permitted by law.

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