Howell Mountain

Howell Mountain is situated in the eastern hills of the Napa Valley and is known for producing some of California’s most sought-after and acclaimed wines, particularly Cabernet Sauvignon and other Bordeaux varietals. What sets it apart is its significant elevation. Vineyards in Howell Mountain typically range from 1,400 to 2,200 feet (425 to 670 meters) above sea level, providing a unique microclimate influencing the grapes’ growing conditions. The higher elevation results in cooler temperatures than the valley floor. The mountain’s vineyards often experience cooler evenings, benefiting grape ripening. The temperature variation between day and night, known as diurnal temperature variation, helps grapes develop complex flavours while retaining good acidity. While the elevation and volcanic soils offer distinct advantages, they also present challenges, including cooler temperatures that can delay ripening, steep slopes that require careful vineyard management, and irrigation due to lower rainfall at higher elevations. The region’s soils are mainly volcanic, with a mix of rocky, well-draining soils. These volcanic soils contribute to the region’s distinct terroir, often imparting mineral notes and a unique character to the wines. The rocky terrain also requires vine roots to penetrate deeply in search of water and nutrients, leading to concentrated flavours in the grapes. While Howell Mountain is known for its Cabernet Sauvignon, it also produces other Bordeaux varietals, including Merlot, Cabernet Franc, Petit Verdot, and Malbec. Zinfandel and Chardonnay are also grown in smaller quantities.