Narrows Earth Mound is a 1.29 kilometer hiking trail located in Lower Brule, South Dakota, featuring historic earthworks along the Lewis & Clark National Historic Trail. This short but culturally significant hike reaches an elevation of 442.7 meters and offers hikers views of the Missouri River valley while exploring ancient Native American mound structures. The trail provides 92 panoramic scenes showcasing both natural beauty and archaeological significance in the South Dakota landscape.