Do I have to wear a helmet when I ride a motorcycle in Colorado?

According to the Colorado Department of Transportation, riders over the age of 18 do not have to wear helmets in Colorado. Operators and passengers under the age of 18 are required to wear DOT-approved helmets while riding. It is still a good idea for all riders to wear a helmet since they have been proven to save lives and prevent traumatic brain injuries (TBI) in the event of a motorycle crash.