7350 S Nogales HwyTucson, AZ 85756 Phone: +1 520-294-7777Fax: +1 520-342-3300Toll Free: +877-777-4212 Hotel Website Classification 7 Superior First Class Commission Rooms Rates - 148 - Hoteliers! Is your information accurate? Update Here Desert Diamond Hotel and Casino Location & Neighborhood One mile south of Valencia Road on Nogales Highway.