Lake Francis Case Fort Thompson to Fort Randall Nearly reaching the South Dakota border, Lake Francis Case is the second biggest reservoir in the state at just over 100 miles long. The Fort Randall Dam creates this reservoir, and just north of it is National Wildlife Refuge Lake Andes. Lewis & Clark Lake | Fort Randall to Yankton This 25-mile lake sits along the South Dakota -Nebraska border, known for its signature shoreline chalky bluffs near Gavins Point Dam in Yankton, and its colorful sailboats. At the northern end of the lake, the Missouri River becomes its old self, narrowing and winding like what Lewis and Clark would have seen in 1804. TRAILS & parks *Lake Thompson RA: Fort Thompson *Snake Creek RA: Platte *Platte Creek RA: Platte *Pease Creek RA: Geddes Spring Creek RA: Geddes *Whetstone Bay RA: Bonesteel White Swan LUA: Lake Andes *North Point RA: Pickstown TRAILS & parks *Randall Creek RA: Pickstown Running Water RA: Springfield Emmanuel Creek RA: Springfield Sand Creek RA: Springfield Charley Creek LUA: Tabor Tabor LUA & RA: Tabor Chalk Bluffs Multi-use Trail: Yankton *Lewis & Clark RA: Yankton Scan here FOR EXCITING TRAILS! *entrance fee or SD state park license required ** Native Recreation Access Permits required RA: Recreation Area LUA: Lakeside Use Area SDMissouriRiver.com // 191 MISSOURI RIVER REGION