Hertelendy Vineyards sources its fruit, not just from our 4+ acre mountainside 1365 ft elevation “Rockwell Ridge” estate vineyard on Howell Mountain (planted in 1993), but also from ultra premium vineyards around the Napa Valley including areas like Oakville, Atlas Peak, Silverado Bench, Coombsville, and the Russian River Valley for our Chardonnay. The majority of Hertelendy’s red vitis vinifera grapes come from tuffaceous rocky soil that is located on the steep, western facing Vaca Mountain slope (with Oakville being the exception). These slopes have volcanic ash, red clay, and granite-like sub soil, getting the best of both worlds: mountainside structure and rich flavors from the valley floor. These hillside locations, blessed with low fertility soil, consistently produce wines of unusual intensity and concentration. The rocky terrain provides excellent drainage and naturally stresses the vines, producing wines of character, complexity, and elegance.