Chateau Ste. Michelle is a winery in Woodinville, Washington, United States, 20 miles (32 km) east of Seattle. It is the state's oldest winery and produces Chardonnay, Cabernet, Merlot, and Riesling, and has winemaking partnerships with two vintners: Col Solare is an alliance with Tuscany's Piero Antinori and Eroica Riesling is a partnership with the Mosel's Ernst Loosen. Chateau Ste. Michelle was selected as Wine Enthusiast magazine's 2004 American Winery of the Year. It was owned by Altria, and then sold to the private equity firm Sycamore Partners in 2021.