Boulder Spirits Port Cask American Single Malt Whiskey 46%

An American single malt finished in port casks — fruity, sweet and full-bodied.

Expert description

Boulder Spirits Port Cask American Single Malt Whiskey is made from 100% malted barley and finished in port casks, adding fruit and sweetness to the base American oak character, bottled at 46%. Boulder Spirits was founded by Scotsman Alastair Brogan, who moved to Colorado in 2011 and started the distillery as Vapor Distillery. The goal was to create a single malt whiskey 'unique to Colorado with a Scottish accent'. The distillery installed one of Colorado's largest copper pot stills and helped establish the American Single Malt Whiskey category, which was only officially recognised in the US in 2025.

Tasting notes

Nose

The nose offers red berries, caramel and a hint of port sweetness.

Palate

The palate is fruity and full-bodied with berries, vanilla and lightly spiced oak.

Finish

The finish is medium-length, sweet and lightly wine-toned.

Specifications

Name: Boulder Spirits Port Cask American Single Malt Whiskey
Distillery: Boulder Spirits
Region/Country: Boulder, Colorado, USA
Type: American Single Malt Whiskey
ABV: 46%
Cask type: Finished in port casks

Flavour profile

Fruity · Sweet · Full-bodied · Wine-toned

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Frequently asked questions about Boulder Spirits Port Cask American Single Malt Whiskey

Who is behind Boulder Spirits?

Scotsman Alastair Brogan founded the distillery in Boulder, Colorado, in 2011 with the goal of making a single malt whiskey with a Scottish approach but an American soul.

What is American Single Malt Whiskey?

It's a relatively new, officially recognised US whiskey category, made from 100% malted barley at a single distillery, inspired by the Scottish single malt tradition but with American cask maturation.

How is Boulder Spirits Port Cask American Single Malt Whiskey best served?

Neat or with a few drops of water to open up the aromas, ideally in a tulip-shaped glass.

What does the port cask add to the whiskey?

The port cask adds fruit, berry notes and a wine-like sweetness that layers on top of the base American oak character from the primary maturation.

How should Boulder Spirits Port Cask American Single Malt Whiskey 46% be stored?

Standing upright, cool and dark, like any other spirits bottle. Once opened, the contents keep best if enjoyed within a year or so.

Is Boulder Spirits Port Cask American Single Malt Whiskey 46% a good gift idea?

Yes, Boulder Spirits Port Cask American Single Malt Whiskey 46% is a natural choice for anyone who appreciates craftsmanship and characterful flavour experiences — especially for the whisky enthusiast keen to explore beyond the most familiar names.