Fort Union Trading Post National Historic Site is the site of a partially reconstructed trading post on the Missouri River and the North Dakota/Montana border, twenty-five miles from Williston, North Dakota. It is one of the earliest declared National Historic Landmarks in the United States. The fort, possibly first known as Fort Henry or Fort Floyd, was built in 1828 or 1829 by the Upper Missouri Outfit managed by Kenneth McKenzie and capitalized by John Jacob Astor's American Fur Company.
Leash Laws: Most parks require dogs to be on a leash in some or all areas, however, some parks allow dogs off leash in certain locations, please consult the parks website before going off leash, Thank you!
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We do our best to keep all information current and accurate - If you see an error or think we have missed something please contact us directly.