Many of our national parks contain places that have special significance to Native American tribes. One such sacred site lies within Missouri National Recreational River: Spirit Mound.
This gently sloping natural hill rises from a broad plain near present-day Vermillion, South Dakota. Geologists say the mound is a remnant of bedrock that was not eroded away by Ice Age glaciers. Whatever its origins, the mound has taken on a variety of cultural meanings reflecting the wide-ranging beliefs of our diverse American population.
Long before white traders and explorers arrived in the northern plains, this little hill was held in awe by the Indigenous peoples who inhabited the area. The Sioux, the Omaha, and the Otoes believed the mound was occupied by spirits that would kill any human who came near.
According to Lakota oral traditions, the Spirit Mound was home to a group of small people called Can O’ti na, or Little Tree Dwellers. The Can O’ti na sometimes behaved mischievously and played tricks on humans. They could also serve as spiritual helpers.


So mysterious were these stories that the explorers Lewis and Clark made a rare nine-mile detour from their Missouri River explorations in 1804 so they could see the mound for themselves. On August 24th, Clark wrote:


When the Corps of Discovery ascended to the top of the mound, it was one of the first times they were able to comprehend the wide expanse of the Great Plains landscape. Clark described the panoramic view from the top:

While the little mound was clearly just a unique geological formation to white explorers, it continued to carry a special meaning for Native tribes, many of whom still have spiritual ties to the place. Lakota ceremonies today, for instance, still include the Little Tree Dweller’s Medicine Bundle. This important medicine traces its origins to Spirit Mound.

The mound was placed on the National Register of Historic Places in 1974. If you visit Missouri National Recreational River, you can see Spirit Mound for yourself thanks to the development of a walking trail to the top. The state of South Dakota (with help of the National Park Service and the Spirit Mound Trust) purchased a 160-acre tract of surrounding land in 2002 with the intention of restoring the site to the prairie landscape that Lewis and Clark saw over 200 years ago. Today, Spirit Mound Historic Prairie is a prairie restoration project in progress.
























































