InCowlitz tribal leaders refused to sign a treaty and move into a proposed reservation site. Randy Cottonware and his sister Molly Gress, who are members of the Cowlitz Tribe, said much of the decor is tied to Cowlitz tribal traditions. The mental game of poker.casino milwaukee potowami GAMBLING FALLACY The Ilani Casino Resort (pronounced ay-LAN-ay) is a casino operated by the Cowlitz Indian Tribe and located near La Center, Washington. The casino opened on April 24, , after a lengthy legal battle over the tribe's right to establish a reservation to build the casino on. When the Cowlitz Tribe’s ilani casino opens in April of , the city expects to see a sharp decrease in card room revenues. Thornton says it’s very difficult to project just how much the private card rooms might be affected by the casino, which will boast a ,square-foot gambling floor with 2. Cowlitz Project reveals name of SW WA casino resort. But the owners of the Spirit Mountain Casino in Oregon’s Coast Range, the Confederated Tribes of the Grand Ronde, fear Spirit Mountain could lose 41% of its revenue when the Cowlitz casino opens near La Center.