SOUTHEAST REGION Lewis and Clark Visitor Center -Yankton Retrace the steps of LEWIS & CLARK The Corps of Discovery explored this area more than 200 years ago. Make discoveries of your own as you follow the trail. AUG. 21, 1804 The Corps of Discovery enters present-day South Dakota. Here in the "Garden of Eden," food sources are plen-tiful. Joseph Fields shoots the party’s first buffalo. Interpretive sign located at Adams Homestead and Nature Preserve, North Sioux City . See one of the last free flowing segments of the Missouri River. devils, however the explores do see a herd of buffalo, nearly 800 of them, grazing in the distance. Interpretive signs found at Spirit Mound Historic Prairie , six miles north of Vermillion on Hwy. 19, which features a 3/4 mile trail to the summit. Three hundred acres of prairie are being restored to original grasses and wildflowers. AUG. 22, 1804 Following the death of Sgt. Floyd, the expe-dition’s only fatality, Lewis and Clark needed a sergeant to replace him. Patrick Gass received 19 votes in the first election by U.S. citizens west of the Mississippi. An exhibit in Elk Point tells the story. AUG. 30, 1804 AUG. 25, 1804 The explorers hike to Spirit Mound. Area tribes believe that "little people" standing 18 inches tall and carrying arrows inhabit the hill. At the top, they do not find the infamous 252 // #SESouthDakota The expedition has its first council with the Yankton Sioux. The explorers present the Yanktons with gifts of tobacco, flags and medals. The Yanktons prepare a feast. Interpretive sign located at Lewis and Clark Recreation Area Welcome Center near Yankton . The Lewis and Clark Visitor Center is another great place to learn more about the expedition, the tribes they encountered and the Missouri River itself. It is located across the bridge over Gavins Point Dam .