Grand Opening Weekend – June 5 & 6 Walla Walla, WA – Exactly one year from its ground-breaking announcement, the new Waterbrook Winery and Tasting Room in Walla Walla will hold its Grand Opening celebration on June 5-6, in time for the “Vintage Walla Walla” event and celebration of the winery’s 25th Anniversary. Waterbrook Winery’s …