Highland Park Cask Strength Release No.4 landed on my desk at a walloping 64.3% ABV, and honestly, that number alone got my attention. This is the fourth instalment in Highland Park's ongoing cask strength series — a range that has built a quiet but devoted following among drinkers who want their whisky uncut and unfiltered, exactly as it comes from the barrel.
At £80.25, you're paying for intensity. This is an NAS (no age statement) release, which means the distillery has prioritised flavour profile over any number on the label. That's a philosophy I can get behind, provided the liquid delivers — and at this proof, there's nowhere to hide. Cask strength whisky is the most honest format you'll find on a shelf. There's no water added after maturation to bring it down to a standard 40% or 43%. What you're pouring is essentially what the blender tasted when they made their selections. Every decision in the warehouse, every cask choice, is right there in the glass.
For anyone unfamiliar with the series, each numbered release offers a different snapshot. The blend of casks shifts, the character moves. Release No.4 continues that tradition as an Island whisky bottled at full power. The 64.3% ABV puts it firmly in serious territory — this is not a casual weeknight pour unless you know what you're doing with a water dropper.
Tasting Notes
I don't have detailed tasting notes to share on this one, so I'll be straight with you rather than making things up. What I can tell you is that at 64.3%, you should expect a concentrated, full-bodied experience that will evolve dramatically with water. I'd recommend adding a few drops at a time — start neat, then open it up gradually. Cask strength whiskies at this level reward patience. The first sip neat will be a punch of alcohol heat, but give it air and a splash of water and the underlying character will start to speak.
The Verdict
I'm giving Highland Park Cask Strength Release No.4 an 8.1 out of 10. Here's why: at £80.25, you're getting a genuinely high-proof, barrel-strength whisky from a well-regarded name, and the price-to-proof ratio is hard to argue with. Many cask strength releases from established producers sit north of £100 these days, so this represents solid value for what's in the bottle. The NAS approach won't please everyone — some drinkers want that age statement — but if you judge whisky by what it tastes like rather than what's printed on the box, this release earns its place. It loses a little ground simply because, without confirmed distillery details on this particular bottling, there's a layer of transparency missing that I always appreciate. But the liquid itself? Confident, uncompromising, and built for people who like their whisky at full volume.
Best Served
Pour it neat in a Glencairn, live with it for five minutes, then add water a few drops at a time until the heat softens and the flavour opens up. At 64.3%, water isn't optional — it's part of the experience. If you're feeling adventurous, this kind of proof also makes a knockout Manhattan: the high ABV stands up to sweet vermouth without getting lost, and you'll get a richer, more textured cocktail than you would with a standard-strength pour. Use a 2:1 ratio of whisky to vermouth and a couple of dashes of Angostura. Trust me on this one.
