Sonoma County Distilling was founded in northern California by San Francisco native Adam Spiegel in 2010. West of Kentucky No. 2 is the distillery's second in a series of annual releases. Like the first, it's made from a mash bill of yellow corn, unmalted rye and cherrywood-smoked barley. It's double-distilled in alembic stills by direct flame, which requires quite the watchful eye. The bourbon is aged in small, new charred oak barrels for over a year before being transferred to used whiskey barrels for further mellowing.