Ft. Mandan Historical Site is located on the western fringe of the Lakes and Gardens Region
in southern McLean County
on the banks of the Missouri River
about 12 miles west of Washburn
The site marks the area where Lewis & Clark set up their encampment for the winter of 1804-05. Triangular Ft. Mandan provided basic sheltering needs as well as a place for a cultural exchange between the Native Americans and the white man.