Hoppenberg Uncertainty Principle
River North Brewery

Hoppenberg Uncertainty PrincipleHoppenberg Uncertainty Principle
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IPA - Belgian
Ranked #54
Ranked #17,606
3.91 | pDev: 11.51%
River North Brewery
Colorado, United States
Very Good
Hoppenberg Uncertainty PrincipleHoppenberg Uncertainty Principle
Reviews: 29 | Ratings: 115 | Log in to view all ratings and sort
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whynot44 from Missouri

4.56/5  rDev +16.6%
look: 4.75 | smell: 4.25 | taste: 4.75 | feel: 4.5 | overall: 4.5

Very cloudy honey/apricot colored brew with some small yeasty bits slowly sinking and a very nice off-white head that retains very well , producing some decent lacing.
The aroma is mellow but complex with caramel malt, citrus, pine resin, notes of spices and tropical fruit.
The taste is along the same lines but somewhat more assertive. There is so much going on here that it's hard to describe. Up front there is a brief caramel sweetness quickly overtaken by a blast of piney/citrus hops and a spicy, peppery background - coriander, cloves, pepper - all blending in with what seems to be notes of pineapple, mango, quava, who knows what else? The finish brings back a lingering blast of pine resin and spice along with some pleasant alcohol warmth. This is really a winter IPA. For several reasons this one should be enjoyed slowly.
The mouthfeel is amazing for an IPA, medium to full bodied with an almost oily texture.
Overall, This was a very interesting and enjoyable brew, not for the faint hearted lager lovers.

Dec 26, 2016
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zeff80 from Missouri

3.89/5  rDev -0.5%
look: 3.75 | smell: 4 | taste: 3.75 | feel: 4 | overall: 4

22oz bottle. Poured out a clear, golden orange color with a small, tin head of white foam. It smelled of caramel, bubblegum and citrus. Sweet toasted caramel and orange with a yeasty kick.

Sep 26, 2016
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TH28 from Florida

3.42/5  rDev -12.5%
look: 3 | smell: 3.5 | taste: 3.5 | feel: 3 | overall: 3.5

Appearance is clear light golden, with a small, thick bubbled head that dissappeared immediately. Aroma is dominated by fruity Belgian yeast. For a double IPA the hop aroma is almost nonexistent, with a slight grapefruit and resin. Taste is a light malt that gives way to a strong, tart grapefruit taste, with hints of apple and pear from the yeast. Mouthfeel is light with low carbonation and a slight solventy alcohol. Finishes with a strong lingering bitterness and grapefruit flavor. Overall this is average at best. Perceived bitterness much lower than the 130 on the bottle would suggest

Aug 18, 2016
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sjdevel from Utah

4.13/5  rDev +5.6%
look: 4.25 | smell: 4.25 | taste: 4 | feel: 4 | overall: 4.25

Very cloudy, but a very interesting tan/orange color. This beer is very bubbly coming from a 22 oz bottle with a 3 finger head (medium pour). The head retention is phenomenal with loads of bubbles rushing up to replenish the supply.

Nice punch of citrus and pine hops at first. Slight tart fruit hints. Buttery, savory, and caramel malt smelling.

Hop bitterness is substantial at first but is fairly short-lived. Sweet malt, caramel, and butter flavors quickly come in. There is then some tart fruit flavors (apple / mango), and citrus, that push to the front. This brew dries out a bit, but overall, remains sweet and syrupy throughout.

Medium+ feel. It seems to occupy a lot of space in the mouth as it remains fizzy and never really dies down. A bit on the thick side for style and quite oily.

Very aromatic and flavorful. This seems like a more savory and fruity version of a double IPA. There doesn't seem to be much evidence of "Belgian" other than some orange undertones. There are no real spice/coriander taste or Belgian yeast tang.

Dec 20, 2015
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schoolboy from Ohio

4.13/5  rDev +5.6%
look: 4.25 | smell: 4.25 | taste: 4 | feel: 4 | overall: 4.25

This starts off looking pretty and smelling like a dream.

Then the taste follows very boozy with a huge not quite Belgian burp.

It's a huge brew that you should sip slowly. Highly recommended.

Dec 13, 2015
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Wasatch from Colorado

4.03/5  rDev +3.1%
look: 4.5 | smell: 4 | taste: 4 | feel: 4 | overall: 4

Revisit: 13 Apr 18
12.7 oz. Bottle
BOTTLED: 07-09-16

Almost 2 years on this bottle.

Poured into a Tree House glass a dark cloudy amberish color, pretty nice carbonation, with a really nice thick/creamy two-finger off-white head, which leaves some pretty nice creamy sticky lacing behind. The nose is hoppy, malty, kinda yeasty, with some citrus. The taste is hoppy, malty, yeasty, citrusy, slight tart. Medium body, ABV is hidden pretty nicely, with a dry/bitter finish. Overall, this is a different brew, pretty tasty though.

22 oz. Bomber

Poured into a chalice a very nice slightly cloudy golden amber color, very nice carbonation, with a very nice thick/creamy one-finger plus off-white head, which also leaves some islands and thick sticky lacing behind. The nose is hoppy, slightly yeasty, spicy/peppery. The taste is very nice, hoppy, nice yeast note, citrusy, slight spice. Medium body, I like their take on the style, which is alittle too much on the spices or whatever, which makes it sometimes to hot. RNB does a very nice job. Overall, this is a very tasty brew, would buy again. Recommended!

Nov 23, 2015
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Rockjocknroll from California

3.38/5  rDev -13.6%
look: 4 | smell: 3.5 | taste: 3.25 | feel: 3 | overall: 3.5

A: Cloudy deep copper; tons of head. Looks great.
S: Belgian yeast and hops...lemony citrus and other fruits, also some serious earthy smells.
T: Slightly sweet, not quite as much as a real Belgian IPA. A lot of the flavors I don't like as much are more prevalent in this beer, and less apparent are the ones I prefer. I don't get the malty sweetness I would like, and the bitterness hangs on for too long. Kind of bites the tongue.
M: Smooth, slightly viscous and coating. Unexpected.
O: The best examples of a Belgian IPA have sweetness in a good way and this one just goes a little off the mark for me. The off flavors are intense and last way too long. Don't get me wrong, it's a good beer and is very drinkable. Just not my thing. Definitely an interesting take on a belgian style.

Nov 20, 2015
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brentk56 from North Carolina

3.89/5  rDev -0.5%
look: 4.25 | smell: 4 | taste: 3.75 | feel: 4.25 | overall: 3.75

Appearance: When you pour a Belgian beer you expect to see an impressive head and, on that count, this beer doesn't disappoint; after the bubble show concludes, three fingers linger over the cloudy honey colored liquid; impressive lacing action

Smell: The Belgian yeast elements are powerful in the aroma, with clove, white pepper and coriander as well as sugary malts; juicy, tropical fruit tones compete but fall short

Taste: With the incredibly high IBUs in this beer, the Belgian elements jut forward but are quickly overshadowed by the bitterness; once the initial onslaught is over, both the Belgian and bitter aspects of the aroma emerge; in the finish, there is also a balsa wood tone that precedes a dry aftertaste

Mouthfeel: Medium to full body with moderate but prickly carbonation

Overall: Well, this beer is aptly named, as it is very hard to pinpoint both the Belgian and IPA aspects in this tug of war on the tastebuds; interesting to contemplate but not that enjoyable to consume is where I come out on this one

Thanks, eawolff99, for the opportunity

Nov 01, 2015
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TheSevenDuffs from Canada (ON)

2.31/5  rDev -40.9%
look: 2.25 | smell: 2.5 | taste: 2.25 | feel: 2.25 | overall: 2.25

This beer was the only one of the few I tried at River North that was really disappointing. The bitterness was extremely restrained and there was barely any Belgian yeast character, which left me confused based on the style of this beer.

Aug 08, 2015
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PabloDerango from Colorado

4.25/5  rDev +8.7%

Sourced a bottle in Denver, November, 2014.

App: Pours an almost orange-gold color, with minimal head that fades quickly. Opaque, with little effervescence.

Sm: Grapefruit, lemon thyme, followed by sweet tropical flavors like papaya.

Taste: Immediate sweetness dissolves into sticky, floral hops notes. Hops are balanced but definitely less forward than would be expected in a traditional double IPA. The resulting warmth from the relatively high alcohol (9.0%) is nicely balanced by tart, citrusy notes that could be the result of the Belgian yeast? It's almost IPA cross-bred with a saison - a great beer for a warm fall day.

An interesting beer when you're not sure you're ready for a palate-wrecking double IPA, but you want something that has floral hop notes to it. Would match well with Korean or Indian food (though I'd steer away from truly spicy stuff, given the ABV).

Nov 19, 2014
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brewandbbq from New Hampshire

4.06/5  rDev +3.8%
look: 4 | smell: 4.25 | taste: 4 | feel: 4 | overall: 4

22oz bottle obtained in Nederland Co.

Pours hazy gold with plenty of dense, whipped head of white. A partial skim coat sustains throughout the glass with plenty of torn lacework.

Aromatics lead off with candied citrus fruit and pine. Apples, cloves and light bubblegum follow through. Orangey with pine-studded apples.

Medium bodied with a sticky, tacky mouthfeel.

Lush, sugar-dusted fruit starts the palate. Clove-spiked apples and some sweet malt follow through.

Finishes with lingering sappy fruit, bitterness to balance, and a mild warmth.

Very nice, but a bit on the sweet side. Dry it up and we have a fantastic beer.

Oct 28, 2014
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iSip from Colorado

4.75/5  rDev +21.5%

River North Brewery Hoppenberg Uncertainty Principle Belgian-style Double India Pale Ale: That is a whopper of a name, and given I was a physics major I like the inside play on words. But how about the beer? The Belgian style IPA mash up is a tricky style, and I have had few the really come out well. River North's Uncertianty Principle may not fit the style perfectly, but it is a luscious beer not to be missed. All aspects of this brew are outstanding. A must try...

Sep 22, 2014
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BeerAdvocate from Massachusetts

4/5  rDev +2.3%
look: 4 | smell: 4 | taste: 4 | feel: 4 | overall: 4

From BeerAdvocate magazine Issue #68 (Spetember 2012):

LOOK: Brilliant golden hue, killer froth

SMELL: Fresh herbs, tropical fruit, exotic spice, yeast, biscuity, dried grass, fume of alcohol, spicy

TASTE: Gentle smoothness, creamy, noticeable bitter, fresh black tea, grass, passion fruit, some spice, mild alcohol, hint of spice, walnuts, yeast, exceptionally long drawn out hoppiness, dry finish

A crazy mashup of styles results in brewers wanting to tackle it, River North nails what it is supposed to be. Belgian character first and foremost but bitterness nails it without ever letting go of what they yeast did. Very mellow alcohol for its size, any true hop head shouldn’t be afraid to climb this IBU ladened mountain.

STYLE: Belgian IPA
ABV: 9.0%

Jun 26, 2014
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ArrogantB from Colorado

3.37/5  rDev -13.8%
look: 4 | smell: 3.25 | taste: 3.25 | feel: 4 | overall: 3.25

On tap at the brewery served in a taster glass. Bright yellow-orange, filmy head. Aroma is esters and floral hops. Flavor is floral hops that slide into a soapy flavor accompanied by the belgian yeast spiciness. Overall I thought this was just ok though it did mask the alcohol well.

Nov 24, 2013
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mactrail from Washington

3.94/5  rDev +0.8%
look: 4 | smell: 3.75 | taste: 4 | feel: 4 | overall: 4

Pours a clear amber with a brownish tinge. Thin but long-lasting cap of foam. Nicely tingly in the mouth. A sweet aroma with something like geraniums.

An intriguing mix of flavors. The surprisingly strong clove flavor is the least pleasant of them. Better is the touch of cedar and mango nectar.

The yeasty dryness comes through midway. Bitterish finish, though less bitter than some of these Belgian hybrids I've been trying lately. Minty chewing gum plus a lot of pepper and pencil shavings. Orange with some orange peel. Still sweet in spite of the yeasty taste.

Quite sippable and you forget it's as strong as a summer white wine. From the 22 oz bottle purchased at Wilbur's Total Beverage in Fort Collins.

Nov 20, 2013
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rawfish from California

3.83/5  rDev -2%
look: 4 | smell: 4 | taste: 3.75 | feel: 3.75 | overall: 3.75

Cloudy orange amber pour into a globe glass nets a rising head of two fingers. Retention is excellent and leaves attractive lacing on the glass.

Intense aroma of hops, booze and Belgian character. Wafting coriander, dried ginger and lemon zest followed by fruity peach, grapefruit and lemongrass. Alcohol aroma is less intense but present.

An explosion of Belgian character, coriander, clove, lemongrass and powdery yeast that blends with a tight pale malt graininess. Hop flavor is limited to a lemon citrus and grassy blast but bold bitterness matches well with the drying Belgian spices and yeast. Alcohol to finish.

High, crisp carbonation keeps this brew on its feet. Body is substantial and appropriate. Dries well though I wish the alcohol could be kept more in check.

Powerful Belgian IPA on all fronts, the spices, yeast and booze are really too much for the hops and malt in this beer. Lots of flavor, fairly complex and I can easily see why it would have a favorable rating. Just not my thing, needs some balance, subtlety and to let the hops shine.

Oct 27, 2013
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beergoot from Colorado

3.68/5  rDev -5.9%
look: 4 | smell: 3.5 | taste: 3.75 | feel: 3.5 | overall: 3.75

Wet grass and tart lemon aroma wafts up from a semi-cloudy, golden yellow body. A thick, creamy white head hovers above the body; creamy and sticky. Bitterness headbutts you with the first sip, followed with a bready, yeasty malt character and backed up with a noticeable boozy character; peppery. A slick, slippery feel across the tongue, coupled with a tingle of tiny carbonation bubbles; crisp and dry finish.

An intense IPA with lots of bite. This one should satisfy those looking for big booze and big hop character.

Aug 31, 2013
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Beaver13 from Colorado

3.43/5  rDev -12.3%
look: 3.5 | smell: 3 | taste: 3.5 | feel: 4 | overall: 3.5

22 oz bottle. Pours hazy golden orange with a medium meringue white head that retains well and laces the glass.

The aroma is some fruit, funky earthy yeast, and some light metallic hops.

The flavor is sweet sugary bready malts with some tropical fruits and earthy yeast and a good sized bitterness in the finish. The mouthfeel is medium to full bodied with smooth carbonation.

Overall, a pretty good Belgian IPA. Not my favorite style but this has decent balance of funk, fruit and bitterness.

Jul 09, 2013
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danbeam from California

4.44/5  rDev +13.6%
look: 4.5 | smell: 4.25 | taste: 4.5 | feel: 4.5 | overall: 4.5

Excellent Belgian yeasty smell, tasting notes of sweet caramel, sugar, mealy bread with delicious subway-esque bakery yeasty with a long tapering finish and light spicy floral notes. For a 130 IBU it is phenomenally easy drinking. Bravo. Light, clear, orange look.

May 20, 2013
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Hop_juice from Wyoming

3.99/5  rDev +2%
look: 4.5 | smell: 3.5 | taste: 4 | feel: 4.75 | overall: 4

Look: hop hazed yellow with orange hues
smell: Belgian esters dominate hop aroma.
taste: bubblegum, belgian earth, mild hop resin/dankness, touch of citrus, heat
Mouthfeel: classic belgian lightness, with a touch of hop body
Overall: solid Belgian dipa, would have preferred the hops to have more of a presence. Beer felt dominated by Belgian yeast. Also alcohol heat could be toned down

Apr 22, 2013
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Mebuzzard from Colorado

4.4/5  rDev +12.5%
look: 4.5 | smell: 4.5 | taste: 4.25 | feel: 4.5 | overall: 4.5

Well, the name is a mouthfull, and so is the beer.

Pours a nice solid golden color, nice billowing head. Some rocks. Lacing is great

Hops and yeast dominate the nose. White pepper, coriander and clove. Followed closely and powerfully by the hops. Citrus and tropical.

One thing I don't really love about B-IPAs is the emphasis on the B. This one does not fit that complaint. The Belgian flavors/spices (coriander, clove, bubblegum and white pepper) are there and provide a good flavor profile The soft biscuit and hops are what makes this beer really good. Yes, it's hoppy, buth combo of Belgian and American flavors is great.

Nice feel on it. Bitey, but not boozey. A really good beer

Jan 19, 2013
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chugalug06 from Colorado

4.14/5  rDev +5.9%
look: 4.75 | smell: 4.5 | taste: 3.75 | feel: 4.25 | overall: 4.25

Great clarity. Awesome three-finger white (with slight green tinted head), brew is amber colored with lots of red and orange. yum.

Boom goes Belgium! BUT, not overly Belgian. Banana, spice, pineapple, mango, Pepper, cloves, unique.

Dry, awsome wet front with an incredibly dry and bitter aftertaste. Belgian yeast leads to weat coast dry-bitterness. Peppery, mango, red apple, bready, papery dryness, leather, and tobacco flavors and feel.

A great Belgian IPA which packs a nice punch @ 9%.. Definitely to be shared, as stated on the label. Well done River North, keep em' coming.. Highly recommended and VERY unique.

Jan 15, 2013
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katan from Colorado

4.12/5  rDev +5.4%
look: 4 | smell: 4.5 | taste: 4 | feel: 4 | overall: 4

22oz into a pint

A - Pours a deep opaque orange color. Pearly white head that doesn't really build, just sits there as a film.

S - Very strong citrus notes, seemingly combining a floral hop character and what I think is the belgian yeast coming through. A little phenols are there.

T - Starts off smooth and sweet, going with pilsner and piles of 2row malts. Mid-stream the yeast takes over - the esters and white peppers rule the day. There are some citrus hops as well, a nice compliment. Finishes with a bit of sweetness and an increasing white pepper base.

M - Thick and creamy, carbonation is strong but just not enough to convince me its balanced or too in line with the nature of other belgians. alcohol warmth grows strong as the beer goes along.

O/D - A very solid belgian IPA. Hits all the main points for this non-traiditional style. A little bit boozy. A bit hefty and filling. The most notable flavors are just a little too muddled to consider this my favoriate BIPA, but its sure up there. I"ll have to try more beers from this brewery.

Dec 01, 2012
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SkeeterBoganski from Colorado

4.23/5  rDev +8.2%
look: 4.5 | smell: 4 | taste: 4.5 | feel: 4 | overall: 4


After doing some very preliminary research, I knew this was the first and only pint I needed to order here...and yes, you read that right: 130 ibus!; I think this is the highest claimed amount of IBUs I've ever drank in a beer; some folks in our party say the beer has a distinct anise flavor...I say it smells like heaven; the color is bright and solid amber; no head and light non-consistent lacing; the nose is like a grapefruit slap in the face; amazingly, this beer doesn't taste as boozy as 9%abv; I'm a huge fan of this beer...kudos for aggressive experimentation.

Nov 11, 2012
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GilGarp from Colorado

3.85/5  rDev -1.5%
look: 3.5 | smell: 3.5 | taste: 4 | feel: 4 | overall: 4

Bomber labeled as Hypothesis.

Seved cold into a goblet.

Hypothesis is a golden amber color with great clarity and thin short-lived head.

Aroma is sweet and slightly spicy but has surprisingly little hop aroma for a double IPA.

Flavor is much stronger and mor bitter than the aroma would suggest. A slightly sweet start to the sip leads to a big bitter hop bite towards the middle. It finishes a bit more dry but the hoppiness lingers on.

Mouthfeel is medium bodied and nicely carbonated.

Overall a solid effort from a River North. It has similar elements to its saison, probably the yeast, but is geared more for the hop head.

Nov 06, 2012
Hoppenberg Uncertainty Principle from River North Brewery
Beer rating: 87 out of 100 with 115 ratings