The R3 Hotel, Restaurant and Bar is the premier entertainment resort in the lower Russian river area of Western Sonoma County. Located in the charming, rustic village of Guerneville close to majestic redwoods, cool river waters and a laid back attitude. The 23 guest rooms, restaurant and freestanding bar and lounge are surrounded by a sparkling pool and expansive sun decking. The R3 Hotel is an adult resort, and you must be 21 or older to enter, except in our restaurant.