The Seven Clans Casino Thief River Falls location boasts a 40, square foot water park with four large water slides, three mini-slides, two hot tubs, a. Minnesota has Main Ave, N. Pros: wonderful water park! Loved the lazy river, water slides (only one smaller one was closed), lots of tables, nice splash pad areas for small kids. Lots. Thief River Falls, MN info. River and more. 7 clans casino hotel prices. Casino, room all suite Hotel and Indoor Water Park featuring over slots, 4 Blackjack tables and 2 restaurants. Seven Clans Casino, Thief River Falls is a tribally owned casino hotel situated near Thief River Falls, Minnesota. 1 History; 2 Property. Contents. Welcome to Seven Clans Casinos, the hottest gaming destination of the north! Whether you like playing slots, blackjack or poker, our casino is the place to. . Exciting casino floor with over slot machines and 4 blackjack tables. A mile from Highway 59, this informal casino hotel is 11 miles from downtown Thief River Falls, and 33 miles from Agassiz National Wildlife Refuge. The casino floor boasts over gaming machines (video slots, poker and keno) and four live blackjack tables so you get Las Vegas action and Northern Minnesota.