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Restaurants · Colorado, Colorado

Mountain Sun Pub and Brewery

  • CuisineBrewpub
  • CategoryCasual Dining
  • Rating★ 4.4
  • Price$$

Mountain Sun Pub and Brewery has been a cornerstone of Boulder's craft beer culture since its founding in 1993, operating as an independently owned neighborhood brewpub on the Pearl Street Mall that predates Boulder's emergence as one of America's premier craft beer cities. The brewery produces all of its beers on-site in small batches, rotating through dozens of styles annually — from crisp pilsners and wheat beers in summer to robust porters, stouts, and barleywines in winter months.

Boulder's quintessential neighborhood brewpub with award-winning craft beers brewed on-site, hearty pub food, and a welcoming community atmosphere that has made it a Boulder institution since 1993.

Mountain Sun Pub and Brewery has been a cornerstone of Boulder's craft beer culture since its founding in 1993, operating as an independently owned neighborhood brewpub on the Pearl Street Mall that predates Boulder's emergence as one of America's premier craft beer cities. The brewery produces all of its beers on-site in small batches, rotating through dozens of styles annually — from crisp pilsners and wheat beers in summer to robust porters, stouts, and barleywines in winter months.

The craft beer sampler ($12) is the standard introduction to the brewery's range — four to five glasses of currently available beers chosen by the server or the guest, an efficient way to navigate a tap list that typically includes 15 to 20 house-brewed options. The pub burger ($14) is an honest, well-made bar burger that has been on the menu in some form since the early years, while the black bean burrito ($13) represents Mountain Sun's commitment to vegetarian-friendly pub food — a Boulder-specific expectation that the restaurant has met consistently for decades.

The dining room occupies a comfortable, lived-in space on Pearl Street with wood paneling, low lighting, and the kind of unpretentious atmosphere that comes from being a genuinely neighborhood-focused operation in a college town. The pub fills with a democratic mix of University of Colorado students, long-time Boulder residents, visiting beer enthusiasts, and tourists who found it in Boulder guidebooks.

Mountain Sun does not accept credit cards — cash only, a policy that has remained in place since opening and that adds to the pub's old-school character. The Southern Sun sibling location operates in South Boulder for guests on that side of the city.

Signature dishes

  • Craft beer sampler — $12
  • Pub burger — $14
  • Black bean burrito — $13

Good to know

Known for
Award-winning craft beer brewed on-site in Boulder's beloved neighborhood brewpub since 1993
Hours
11AM-1AM daily

Location

1535 Pearl St, Boulder, CO 80302

40.0176, -105.2796 View on map

Highlights

  • Independent Boulder brewpub since 1993, predating the city's current craft beer fame
  • All beers brewed on-site in small batches with 15–20 rotating taps at any given time
  • Cash-only policy maintained since opening — a deliberate old-school pub character
  • Vegetarian-friendly pub menu reflecting Boulder's dietary culture alongside classic pub food
  • Pearl Street location in the heart of Boulder — Southern Sun sister pub in South Boulder

Tips for visiting

  • Mountain Sun is cash-only — bring adequate cash or use the ATM nearby before arriving.
  • The beer sampler is the most efficient way to navigate a frequently rotating tap list of 15–20 house beers.
  • The pub fills quickly on Friday and Saturday evenings; arriving by 6 PM avoids the longest waits.
  • Ask about seasonal and limited one-off brews not on the standard menu — the brewing program frequently experiments.
  • The Southern Sun in South Boulder shares the same beer program and is a good alternative when Pearl Street is crowded.

Accessibility

Mountain Sun Pub and Brewery is at 1535 Pearl St on Boulder's pedestrian Pearl Street Mall. The pub is on one level with step-free entry from the mall. The interior has standard pub furniture; guests requiring accessible seating should request it upon arrival. The Pearl Street Mall is fully accessible with paved, level surfaces.

Frequently asked questions

Does Mountain Sun accept credit cards?

No. Mountain Sun Pub and Brewery has been cash-only since opening in 1993. An ATM is available nearby; guests should plan for cash payment before arriving.

How many beers does Mountain Sun brew?

Mountain Sun produces all of its beers on-site and typically has 15 to 20 different house beers on tap at any given time. The lineup rotates heavily with the seasons, with lighter styles dominant in summer and darker, higher-ABV styles appearing in fall and winter.

Is Mountain Sun vegetarian-friendly?

Yes. Mountain Sun has maintained a vegetarian-friendly menu since opening, reflecting Boulder's dietary culture. The black bean burrito and other plant-based options are permanent menu features.

Is there a second Mountain Sun location?

Yes. Southern Sun Pub and Brewery in South Boulder shares the same independently owned brewing program and menu philosophy as the original Pearl Street location. The two pubs operate independently but pour the same house-brewed beers.