Fort Clark Trading Post State Historic Site was once the home to a Mandan and later an Arikara settlement.

Today only archeological remains survive at the site located eight miles west of Washburn, North Dakota, United States.

In 1830, a representative of the American Fur Company built Fort Clark Trading Post south of the village.

The first steamboat to journey up the upper-Missouri River was the Yellowstone which arrived in 1832 carrying 1,500 gallons of goods and liquor.

George Catlin visited in 1832, and Karl Bodmer and Prince Maximilian of Wied-Neuwied stayed the winter of 1833-1834.