The heart of Hundred Acre is the three estate vineyards Woodbridge bottles separately. KAYLI MORGAN (known as Morgan's Way from the 2019 vintage) is located toward the base of Howell Mountain, at too low an elevation to be included in that AVA. According to Woodbridge, it's a dome of clay, volcanic gravel and obsidian. "It's the most elegant of the wines because the clay keeps the vines cool," he said. Because of the clay content, he considers the site largely immune to Napa's troublesome heat spikes.