FREE. Sonoma County Bicycle Coalition. Petaluma & Santa Rosa. Ages 5-11. Step-by-step guided instruction, how to balance & get rolling. Bring bicycle with training wheels removed & helmet. $10. 9/10: Lucchesi Park, 320 North McDowell Blvd, Petaluma. 9/17: Finley Community Park. 2060 W. College Rd., Santa Rosa. 3:30 p.m.–4:30 p.m. Pre-registration required: tinyurl.com/y7bpzsaf.