GRASS VALLEY - August 27, 2011 Sierra Brewfest, Grass Valley, CA Sierra Nevada Brewing Company presents the Sierra Brewfest, which   takes place at the Nevada County Fairgrounds in Grass Valley. Last year's festival was an afternoon event, held under Ponderosa pine trees, with beer from more than 25 microbreweries; live blues music; and food, including sausages, barbecue, and Mexican dishes. 3-6:30 p.m. $25. Amaral Family Festival Center at the Nevada County Fairgrounds, 11228 McCourtney Road, Grass Valley, CA musicinthemountains.org