The Chiles Valley is nestled in the Vaca Mountains above the northeast side of the . The appellation has a cooler climate than the main Napa Valley floor due to elevations of 600-1200 feet as well as a cooling breeze from the Pacific Ocean. The most planted grapes in Chiles Valley are Cabernet Sauvignon, Zinfandel, Chardonnay, and Sauvignon blanc.