Phone, Suggest a phone number · Address, Suggest an address River Road Casino, Santa Rosa, California. 1 like · 7 were here. Casino. River Rock Casino, located in Northern California in Sonoma County, features slot machines, table games including blackjack, roulette, casino games, and a. A map showing casinos and other gaming facilities located near River Rock Casino, located in Geyserville Bennett Valley Road, Santa Rosa, California.