 It stretches from the Columbia River in the north to just south of Eugene in the south, where the Willamette Valley ends; and from the Oregon Coast Range in the west to the Cascade Mountains in the east.At , it is the largest AVA in the state, and contains most of the state's wineries; approximately 200 as of 2006.The boundaries of the Willamette Valley AVA were established in 1984, and since then seven new, smaller AVAs have been created within the northern portion of Willamette Valley AVA.