Park Lookout is an independent site, not the National Park Service. We are not affiliated with NPS. Confirm conditions on nps.gov before you go: official Fort Union Trading Post National Historic Site page.
Current NPS alerts (0)
NPS lists no current alerts for this site as of Oct 24, 2026, 9:57 PM ET.
Weather alerts (National Weather Service)
No active NWS watches, warnings or advisories for the forecast zone and county at the park's central point.
About this 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 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.
- Type
- National Historic Site
- States
- Montana, North Dakota
- Address
- 15550 Highway 1804, Williston, ND 58801