Charles Krug produces Cabernet Sauvignon and Cabernet Franc from St. Helena, a region in Napa Valley known for structured, age-worthy red wines. The winery's limited-release bottlings—including the X Clones Cabernet Sauvignon and the Slinsen Vineyard Cabernet Sauvignon—reflect the precision and depth the region affords. These wines have been assessed by Wine Advocate, Wine Enthusiast, Decanter, Wine Spectator, and Falstaff. The Cabernet Franc limited release rounds out the portfolio, demonstrating the winery's range across Bordeaux varieties. St. Helena's warm days and cool nights create conditions for full phenolic ripeness while preserving acidity and complexity—hallmarks of the finest Napa Valley reds.