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Map of Sidney, MT

Cultural Centers in Sidney, MT

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1. Fort Union Trading Post National Historic Site

Fort Union Trading Post National Historic Site

15550 Highway 1804, Williston, ND 58801

OPEN NOW:9:00 am - 5:00 pm

From Business: The Grandest Fort on the Upper Missouri River Between 1828 and 1867, Fort Union was the most important fur trade post on the Upper Missouri River. Here, the Assiniboine and six…