Located on the east side of Duncan Peak and southern Mendocino County, lies Topel Winery’s Hidden Vineyard where they have planted Cabernet Sauvignon, Merlot, Petit Verdot, and Syrah within the steep, rocky slopes. Topel Winery winemakers Mark and Donnis, practice organic and biodynamic farming, and tend to the vines year round to produce premium handcrafted wines.