Open Door Brew Co., formerly of Lafayette, is debuting new digs in Prospect Park. And Niwot’s Bootstrap Brewing Company is cutting the ribbon on a new production facility and bar in the former Times-Call warehouse on Pratt Street.

“I’ve lived in every ‘L’ town from Loveland to Littleton, and Longmont was on my list,” joked Billy McDivitt, co-owner and “chief reality office” of Open Door, which has brewing operations in Denver but maintains “corporate headquarters” out of McDivitt’s Lafayette home.

It was Amy Lane, of Basis Architecture and Design, who brought Open Door to Longmont. She approached the brewery’s owners during an event in Prospect Park, thinking they would be a good fit for the building under construction at 2030 Ionosphere St.

The rooftop patio won over McDivitt and his business partner and cousin, Andy Riedel. (Riedel’s title, in case you were wondering, is “chief dreams officer.”) Riedel gave Open Door its name when he began homebrewing in his college apartment.

 “It would get hot and steamy so we’d open the door and our neighbors would smell what we were doing and come by,” Riedel said. “That’s how I got started sharing my beer. The name became representative of what beer should be about: opening your door and sharing it.”

Accessibility is also the theme Open Door’s beers will follow — easy drinkin’, as Riedel calls it.

What’s not so easy is staying competitive in a crowded market. The number of craft breweries reached new heights in 2016, with more than 5,000 nationwide and 264 in Colorado, according to the Boulder-based Brewers Association.

But the incredible growth that most of the country’s small and independent brewers have been experiencing in recent years is slowing. The growth rate was 8 percent as of mid-2016 — the first time in a decade it didn’t reach double digits.

Those numbers don’t worry Leslie Kaczeus, of Bootstrap Brewing. Up and running for five years, the Niwot operation is going so strong that it needed the Longmont expansion to keep with demand.

“We’re selling everything we can make as fast as we can make it,” Kaczeus said. “We can’t make enough beer right now.”

Andrew Fowler, left, and Anthony Bozanic enjoy a fresh beer at the new Open Door Brewing Co. taproom on Tuesday in Longmont.

Andrew Fowler, left, and Anthony Bozanic enjoy a fresh beer at the new Open Door Brewing Co. taproom on Tuesday in Longmont. (Jeremy Papasso / Staff Photographer)

Bootstrap last year brewed 2,100 barrels, distributing it along the Front Range from Castle Rock to Fort Collins. The Longmont facility has a capacity for up to 25,000 barrels, but Kaczeus said she and her business partner and husband, Steve, won’t be at that volume for a while.

“We’re going to grow only as it makes sense. We’re still bootstrappin’ it.”