Show You Should Know – Mountain Sun’s 25th Birthday Bash at Planet Bluegrass Emma JerrySeptember 12, 2018 Next weekend Boulder's Mountain Sun Pub & Brewery is celebrating its 25th anniversary with one heck of a blowout bash at Planet Bluegrass in Lyons. Formally... 303 MagazineDenver MusicInterviewsMusicThis Week’s Concerts3 min read