Confused about bike laws? Feel free to phone Bicycling Monterey.   Bicycle helmet requirements for California Youth. California DMV VC Section 21212 states that people younger than age 18 are required to wear helmets when biking on “a street, bikeway, as defined in Section 890.4 of the Streets and Highways Code, or any other public bicycle path or trail.” Youth, … Continue reading FAQs: Are bicycle helmets required in Cali?