Sherwin Family Vineyards in the Spring Mountain district of Napa Valley was started in 1996 by Steve and Linda Sherwin, a Bay Area couple with an interest in winemaking. The 30-acre property they purchased came with 2.5 acres of well-established vineyards. In 1999 the Sherwins released their debut commercial wine, a 1996 Cabernet Sauvignon. Steve Sherwin eventually cleared another 14 acres for vineyards and today the estate is known for its Cabernet Sauvignon and Cab/Merlot blend, called Cobalt.