Cornerstone Cellars was founded in 1991 by Bruce Scotland, Michael Dragutsky and David Sloas. The trio wanted to make Cabernet Sauvignon from Howell Mountain grapes and for a decade they sourced their Cabernet and Zinfandel grapes before buying 13 acres on Howell Mountain. Scotland left the partnership in 2001. Today the estate makes several “collections,” including wines from Oregon grapes. Though best known for Cabernet Sauvignon, Cornerstone also makes Sauvignon Blanc, Riesling, Syrah, Cabernet Franc, and, in Oregon, Chardonnay and Pinot Noir.