Yellowstone American Single Malt Whiskey – the newest full-time member of the Yellowstone brand family and the latest inspiration from Limestone Branch Distillery Master Distiller Stephen Beam – is set to hit retail shelves in the coming months. Aged four years and bottled at 108 proof (54% ABV), Yellowstone American Single Malt Whiskey will be available nationwide starting in March at a suggested retail price of $54.99.