Fort Union Trading Post National Historic Site is located in the state of North Dakota and was established in 1966. The site was once a bustling center of commerce and cultural exchange between American Indians, European traders, and settlers. Some good reasons to visit the site include learning about the history of the fur trade and its impact on the region, exploring the reconstructed fort and buildings, and hiking the nature trails.

Specific points of interest to see at Fort Union Trading Post National Historic Site include the reconstructed fort and buildings, the historic cemetery, and the visitor center's exhibits. Visitors can also participate in ranger-led programs and demonstrations to gain a deeper understanding of the site's history and culture.

Interesting facts about the area include that Fort Union was one of the largest and most important fur trading posts on the Upper Missouri River, and that it served as a hub for traders, American Indians, and settlers for over 40 years. The site was also a key location during the Lewis and Clark Expedition, as the explorers stopped at the fort on their journey west.

The best time of year to visit Fort Union Trading Post National Historic Site is during the summer months when the weather is mild and the site is most accessible. However, visitors can also enjoy winter activities such as snowshoeing and cross-country skiing on the nature trails.