12 Tribes Colville Casinos proudly boasts three properties to entertain patrons in Washington State. 12 Tribes Omak Casino Hotel located in Omak, WA is our newest property. Featuring a 56,000 square foot gaming floor with 500+ slots, table games, 2 restaurants, a casino lounge, a nightclub, plus an 80 room hotel with 12 luxury suites. 12 Tribes Lake Chelan Casino located in Manson, WA has 600+ slots, table games, restaurant, deli and a nightclub. 12 Tribes Lake Chelan Casino also holds a summer concert series every year in the Deep Water Amphitheater - The Pacific Northwest's only outdoor concert venue with covered seating. 12 Tribes Coulee Dam Casino located in Coulee Dam, WA offers a more intimate casino experience with 150+ slots, restaurant and a lounge.