Grossen Bart Brewery Share: Brewery/Beer Club Grossen Bart Brewery Visit Website Request Info 1025 Delaware Longmont, CO 80501 720-438-2060 www.grossenbart.com About Map About We are a 10bbl Brew House and serve only our beer brewed on site. We offer weekly live music, food trucks, and FREE popcorn! We are pet and family friendly. What's Nearby? Distance: 5 10 15 20 25 50 mi.