Music in the Mountains (MIM) invites the community to don masks and costumes or gowns and step into an evening of elegance, mystery and music at its Fall Gala: Moonlight Masquerade, happening on Saturday, Oct. 24 at 5 p.m. at the Center for the Arts in downtown Grass Valley. Guests will enjoy cocktails and appetizers, a delicious filet mignon or vegetarian meal, and a heartwarming live performance by the Music in the Mountains Youth Orchestra.