Boulder SourFest 
Pucker up. Avery Brewing highlights unique and tart American beers made with wild yeast at the fifth-annual SourFest. If you're too late to score tickets to this always-sold-out fete, you can still get your fill of sours at Crooked Stave Artisan Beer Project or New Belgium Brewing. Tickets include 16 tastes, and part of the proceeds will benefit a community member in need. Sat noon-5 p.m.
—Photograph courtesy of Avery Brewing Company