Vineyards

Stagecoach Vineyard

Rising high above marine layer fog in the Vaca Mountains with red, volcanic rocky soil, Stagecoach Vineyard produces some of Napa Valley’s most coveted fruit.

Dr. Jan Krupp and his brother Bart fell in love with the rugged mountain site that would become one of Napa’s most iconic vineyards. Despite a harsh landscape—riddled with rocks and boulders, choked with chaparral—and the absence of a known water source or road access, they saw the makings of a world-class vineyard. In 1995, with the help of a water witch, the removal of more than 1 million pounds of rock, and the construction of a snaking road requiring 135 legal documents, Stagecoach Vineyard was born. Today, Stagecoach is one of the two largest vineyards in Napa, with nearly 500 acres planted, providing fruit for some of the area’s finest wineries.

Though the brothers sold the vineyard in 2017, Jan continues to source from its best blocks for Krupp Brothers wines. Stagecoach fruit brings bold tannins, layered flavors of fruit, herbs, and spice, and the structure to age gracefully for decades

Krupp Brothers Estate Vineyard

When Dr. Jan Krupp and Bart Krupp acquired the winery in 2017, Jan set about to reshape the surrounding vineyard. Though Stagecoach is perched atop rugged volcanic slopes, and the Estate nestled into the Silverado Bench on the valley floor—they share key traits: rocky, complex soils and microclimates that favor balanced, powerful fruit.

At the Estate, a 98-foot knoll and nearby lake mirror Stagecoach’s natural advantages. The lake helps regulate temperature much like Stagecoach’s boulder-strewn terrain, by warming evenings and reducing frost risk. Though lower in elevation, the Estate’s position helps buffer against temperature swings. Jan replanted a third of the 13-acre vineyard, introducing clones he knew from Stagecoach were exceptional. Among them is the Weimer Cabernet clone, a standout in M5.

The Estate fruit is intensely flavorful, structured yet supple, bursting with black and blue fruits and polished tannins. The Sauvignon Blanc is equally compelling, offering a bright, well-balanced expression with layered tropical flavors. Grapes from the Estate are blended with fruit from Stagecoach and other prized sources to create wines such as Veraison Cabernet, Synchrony, and Water Witch.

J-Squared Vineyard

Tucked into the Coombsville appellation, J-Squared benefits from the cooling influence of nearby San Pablo Bay. Gentle marine breezes and morning fog create a temperate climate—warm, sunny afternoons promote ripening, while cool mornings and evenings help retain vibrant acidity. The gravelly loam soil—a mix of small rocks, volcanic ash, sand, silt, and clay—ensures excellent drainage and a balanced supply of nutrients. These ideal conditions produce wines with vivid fruit character, lively acidity, and supple, well-integrated tannins—qualities beautifully showcased in The Damsel Rosé and often complementing fruit from other sources in The Doctor and The Wheelman.

The name is a tribute to Dr. and Mrs. Krupp, who share the first name Jan, J-Squared spans nine acres surrounding their home. Each block of the vineyard bears the name of one of their beloved grandchildren.