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Today the temporary structures are long gone, replaced by a handsome, 62,square-foot gaming tiverrock and a seven-story parking garage. Room was quiet and relaxing, beautiful and 5 star clean. Slot machines include state-of-the-art progressives and slant tops running the latest games, as well as riverrock casino com favorites like Wheel of Fortune. Java Jack's … View Menu. In a few years after opening the casino expanded to 1, slot machines, 20 gaming table and a buffet restaurant. I had a haf day to kill so went to River Rock. Want to spend the night?River Rock Casino, located in Northern California in Sonoma County, features slot machines, table games including blackjack, roulette, casino games, and a. River Rock Casino, Geyserville: See 74 reviews, articles, and 8 photos of River Rock Casino, ranked No on TripAdvisor among 29 attractions in Geyserville. Because Sonoma County is known for bucolic beauty and outdoor pursuits, visitors are sometimes surprised to learn about River Rock Casino ( Highway.