Casual casino hotel offering relaxed rooms, plus an indoor water park & 2 dining options. 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 lazy. 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. SEVEN CLANS CASINO THIEF RIVER FALLS. Thief River Falls MN Phone: Visit their website. Center Street East Thief River Falls, MN Casino • Sports • Live Dealer • Poker #1 Choice of. Seven Clans Casino Hotel & Indoor Water Park · Map · Center St E Thief River Falls, MN Directions · () Call Now · Known For. Lots. . Yes. E. #5 of 7 things to do in Thief River FallsCasinos (MN)Thief River FallsThings to Do in Thief River FallsSeven Clans Casino Thief River Falls. Water Park - Thief River Falls · Page · Casino · () · [HOST] · Rating · (1, Reviews). Seven Clans Casino, Hotel and. Seven Clans Casino /Hotel/Indoor Water Park Center St. Seven. 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. INDOOR WATER PARK! The Seven Clans Casino Thief River Falls location boasts a 40, square foot water park with four large water slides, three mini-slides. Accepts.