Thirteen bands on 3 stages. Local artisan crafts, food, & drinks for purchase. $65–$179. Ages 13–17: $25 (at the door). Ages 12 & younger: Free with a paying adult. Bring blanket or low-back chair. No pets. Benefits the music program in Petaluma schools. 11:30 a.m.–9:30 p.m. Sonoma–Marin Fairgrounds. 100 Fairgrounds Dr., Petaluma. petalumamusicfestival.org.