Since opening our doors in 1990, Royal River Casino + Hotel continues to be the preferred entertainment destination for excitement seekers in southeast South Dakota, southwest Minnesota, northwest Iowa and across the upper Midwest. Located just 35 minutes north of Sioux Falls, SD, Royal River Casino & Hotel fulfills every entertainment and relaxation need with the hottest casino filled with classic and modern slots, live card games, roulette, craps; two restaurants offering a delicious variety of menu items and full buffet; soothing hotel rooms, and the best in events and entertainment – every day! The Flandreau Santee Sioux Tribe is comprised primarily of descendants of "Mdewakantonwan", a member of the Isanti division of the Great Sioux Nation, and refer to themselves as Dakota, which means friend or ally. The Flandreau Santee Sioux Indian Reservation is 5,000 acres of combined trust and fee tribal land located along and near the Big Sioux River in Moody County, South Dakota, in a region known as the Prairie Coteau, which consists primarily of undulating or gently rolling land.