Climate: Cool, mountain-influenced, with temperatures about 10 to 15°F cooler than the Valley floor in summer. Above the fog line, there is a low diurnal change, with summer temperatures rarely above 90°F (30°).
Elevation: 760 to 2600 ft (231m to 792m).
Rainfall: 38 inches (96 cm) annually.
Soils: Volcanic in origin, with basaltic red color, shallow with limited water retention, so irrigation is often essential.
Principal varieties & characteristics: Cabernet Sauvignon: Bright berry and cherry fruit, and more acidity than wines from Stags Leap District. Chardonnay: Crisp, flora, aromatic, with distinctive pear-mineral flavors and bright acidity.