Question Who must wear a helmet while riding in Colorado? Answers All operators Operators under the age of 18 Operators who have had their license for less than two years Helmets are not required to be worn by any operators. Explanation In Colorado, all operators and passengers under the age of 18 must wear approved helmets while riding. It is recommended that all motorcycle riders wear helmets. Take a FREE Practice Test Now This questions appears in the following tests: Colorado Practice Test