The vineyards are planted from the lower level near the lake at 1,370 feet to the rocky red volcanic soil at more than 2,000 feet elevation around Mt. Konocti, a dormant volcano in the Pacific Rim chain. These elevations provide cooler winter conditions and a later start to the growing season. Summer growing conditions are suitably warm to ripen the grapes and the elevation allows rapid cooling in the evening. Few grape pests can tolerate the altitude and cool climate. Lake County growers are committed to sustainable farming and participate in yearlong education programs to this end.
Just north of Napa and surrounding Clear Lake, the largest natural lake in California, Lake County is known for its high-altitude wine production.