Riverton, Wyoming -What started as a small bingo hall twenty years ago has now turned into a source of pride for the Northern Arapaho people. Today, the Wind River Hotel and Casino is the premier gaming establishment in Wyoming. Wind River is owned and operated by the Northern Arapaho Tribe. Featuring over 800 Vegas style slot machines and 10 live table games, including roulette, Blackjack and craps, Wind River is the largest gaming facility in Wyoming.