Subject to a few exceptions, consumption and possession of alcohol by a person under 21 years of age is illegal in Colorado. A person under the age of 21 who operates a vehicle while intoxicated can be charged with a class A traffic infraction for a first offense and a class 2 traffic misdemeanor for a second or subsequent offense.
Sobriety checkpoints are legal in Colorado (see 803 P.2d 483 (Colo. 1990)). These checkpoints (also referred to as "mobile checkpoints" or "roadblocks") are police traffic stops that are not tied to any specific or individual suspicions.
In Colorado, it’s unlawful to knowingly consume or possess an open container of alcohol or marijuana in a vehicle that’s on a public road or right-of-way. Read about the specifics about what the prohibits and the consequences of a violation.