Spring Mountain Vineyard is a historic Napa Valley estate with vineyard origins dating to the late 19th century, situated high on the forested slopes of the Spring Mountain District. The property’s steep elevations, volcanic and sedimentary soils, and cooler mountain climate shape a distinct, low-yielding viticultural environment. Alongside its red wines, the estate has periodically produced small-lot late-harvest bottlings from Sémillon, a variety well suited to extended ripening in these conditions. The 1989 “Ambroisie” reflects Spring Mountain Vineyard’s estate-driven approach and its tradition of crafting limited-production wines that express site and vintage through careful vineyard selection and classical cellar practices.