Young vocalists compete  for $500 prize Eight courageous young vocalists ages 12 to 21 will compete in a vocal competition sponsored by The Sierra Master Chorale and InConcert Sierra. Show starts at 2 p.m. today at The Center for the Arts, 314 W. Main St. in Grass Valley. For information, visit inconcertsierra.org. Autumn Shindig Harvest Festival today Now in its seventh year, this family-friendly event features live music, local crafts, games, contests and more. Festivities run from noon to dusk today at the North Columbia Schoolhouse Cultural Center, 17894 Tyler Foote Road in Nevada City. Proceeds benefit the center. For …