The Grass Valley Wine Co. has opened its doors with Bent Metal Winery, Montoliva Vineyard & Winery, Pilot Peak Vineyard & Winery and Solune Winegrowers, all award-winning wineries based in Nevada County. They have joined at the Union Square Event Cente to create a new wine experience, and event capabilities have already made them the talk of the town. Grass Valley Wine Co. is located in the historic Union Square Building at 151 Mill St. in downtown Grass Valley.