New Riff 6-Year Single Barrel Kentucky Straight Bourbon Whiskey is a Costco-exclusive single barrel selection from New Riff Distilling in Newport, Kentucky. Each barrel is individually chosen for its quality and complexity, then bottled at barrel proof without chill filtration to preserve the full character of the whiskey.

The bourbon is crafted from a mash bill of 65% corn, 30% rye, and 5% malted barley, and aged for at least six years in new charred American oak barrels. The extended maturation delivers deeper complexity and richness compared to younger expressions, with a signature balance of sweet, oaky, and spice-driven character. Bottling at barrel proof — 116.4 proof (58.2% ABV) — ensures a full-bodied, layered experience and an unfiltered finish that honors the whiskey's natural identity. No two single barrels are alike, making each bottle a unique expression of the distillery's craft.