The Alcohol and Tobacco Tax and Trade Bureau (TTB) establishes the approximately 144,000-acre "Tualatin Hills" viticultural area in portions of Multnomah and Washington Counties, Oregon, and the approximately 33,600-acre "Laurelwood District" viticultural area in portions of Washington and Yamhill Counties, Oregon. TTB is establishing both viticultural areas in the same document because a small portion of their boundaries is contiguous. The two viticultural areas lie entirely within the established Willamette Valley viticultural area. The Laurelwood District viticultural area is also entirely within the established Chehalem Mountains viticultural area. TTB designates viticultural areas to allow vintners to better describe the origin of their wines and to allow consumers to better identify wines they may purchase.