The Bourbon Vertical Series is a unique opportunity to follow a group of 1,350 MGP bourbon barrels as they age from four to sixteen years, and experience the arc of flavors throughout the thirteen-year journey. Every year, Pinhook selects a group of bourbon barrels from the lot and blends and proofs them to create the most balanced expression of the whiskey at that age. The Vertical Series began with the inaugural 4 Year release in 2019, and the journey continues through annual releases up to age 16.