Spirit Mound Historic Prairie and the Lewis and Clark Expedition

On August 25, 1804, the Lewis and Clark expedition walked to the mounds from their camp.

Spirit Mound

Spirit Mound Historic Prairie is a state park of South Dakota, USA, featuring a prominent hill on the Great Plains. The Plains Indians of the region considered Spirit Mound the home of dangerous spirits or little people; members of the Lewis and Clark Expedition climbed it on August 25, 1804. The park was established in 2002.

• http://en.wikipedia.org/wiki/Spirit Mound Historic Prairie