Cole Ranch AVA In the realm of wine appellations, Cole Ranch AVA holds a remarkable distinction—it is the smallest appellation in North America. Nestled within the rolling hills of Mendocino County, this intimate and exclusive AVA is a true hidden gem. Despite its small size, Cole Ranch is renowned for producing wines of exceptional character and finesse. As you delve into the wines crafted from this distinctive terroir, you’ll experience the essence of an appellation that offers a rare and captivating expression of its microclimate and soil.