The new casino is located south of Chandler. Read more Gila River Casino Santan Mountain Opens June 30 -Īfter 18 months of construction and a cost of $180 million, the new Gila River Casino Santan Mountain is ready to celebrate its grand opening on June 30. Country music star Gabby Barrett will perform with live shows at 8 PM on both nights. The grand opening of the new Gila River Casino at Santan Mountain will be celebrated June 30 and July 1. Read more Santan Mountain Casino prepares to open June 30! J. The celebration will include a special performance by. Gila River Resorts & Casinos opens its new Santan Mountain Casino today with a two-day, grand-opening celebration (June 30 - July 1). Read more Santan Mountain Casino Opens Today! J. The BetMGM Sportsbook is a 7,000 square-foot betting lounge with a 130-foot LED screen. The largest casino sportsbook in Arizona is located inside the new Santan Mountain Casino. Read more Santan Mountain Casino Boasts Largest Sportsbook in AZ J. Santan Mountain Casino, which boasts the largest sportsbook venue in Arizona, has now added the largest sportsbook LED video wall in the state. News Headlines Santan Mountain Casino boasts AZ's largest sportsbook Decem.

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