Potter Valley AVA is located in Mendocino County, California. Namde after the Potter Valley, it lies east of Mendocino’s Redwood Valley (see Redwood Valley AVA), the upland Potter Valley AVA sits more than 200 feet higher than its surrounding areas. Great day-night temperature variations separate Potter Valley from other growing areas in Mendocino. Mid-day in this inland valley can be truly hot, but nighttime temperatures plummet. Under such conditions, varieties like Sauvignon Blanc, Chardonnay, Riesling, and Pinot Noir flourish, developing strong but refined character.