The Vineyard sits on the high slopes of Diamond Mountain at an elevation of 1285 feet, about 1,100 feet above the valley floor. Some of the most sought after Napa Valley wines are those that come from the Diamond Mountain appellation. The winemaker, Matt Blankenheim, describes the vineyard as “a winemaker’s dream”. At its elevation, the vineyard is blessed with gravelly loam soil, 20% slopes, full sun exposure, hot days, cool nights, and a perfect breeze that blows through the vines keeping the loose clusters of grapes free from holding the morning dew.
Location : The Diamond Mountain appellation was once (before recorded history) the site of the Russian River which became redirected to the North and West as a result of volcanic activity. Wine grapes, particularly Cabernet Sauvignon, are the true diamonds of this remarkable AVA. Covering 5,000 rocky acres in the Mayacamas Range on the northwest side of Napa Valley, this region has just over 500 acres under vine. Due to the up-valley location and the high elevation of vineyards, the fog that influences the valley floor is not a factor here but the grapes are cooled by prevailing fog from the Sonoma Coast which kisses the sunny ridge line. Unique, porous volcanic soils and extended exposure to the sun are the reasons that world-class wines are made here.
History : The Petersen family sold over 200 acres of their Diamond Mountain ranch to what became Sterling Vineyards in the late 60’s. They kept a 13 acre parcel that became their home site and had Sterling plant a small vineyard (5 acres) for their benefit. In 2002 TNT purchased the Petersen parcel and took the vineyard out of production while working to revitalize the 40 year old vines and engage in intensive and careful hand farming techniques.