Summers produces Cabernet Sauvignon and Bordeaux blends from Calistoga, the northernmost appellation of Napa Valley. The region's volcanic soils and warm days create conditions for ripe, structured reds. The winery's Cabernet Sauvignon anchors its portfolio, joined by Checkmate, a blend of Petit Verdot and Cabernet Sauvignon, and Reserve Cabernet Sauvignon Knights Valley. Wine Enthusiast and Wine Advocate have rated these releases.