Question: Is it against the law ride a bicycle in Billings without wearing a helmet?
Answer: No, unless you're under the age of 16.
According to Billings city code, anybody younger than 16 years old riding a bike, including as a passenger, within the city limits must wear a helmet "of good fit which is securely fastened to the operators head."
City code also says that it's against the law for parents or legal guardians to let children younger than 16 ride or be a passenger on a bicycle unless the child is wearing a protective helmet at all times.
Billings Police Lt. RD Harper said that a parent or guardian can be ticketed for the offense, which is a civil infraction and typically carries a fine of up to $110.