Quatro produces Cabernet Sauvignon and Merlot from Sonoma County, in California's North Coast region. The Cabernet Sauvignon, the winery's flagship red, draws on the area's capacity for structured, age-worthy wines built on ripe dark fruit and tannin. The Merlot offers a softer entry point to the portfolio, reflecting the grape's natural plushness. Wine Enthusiast has rated both wines.