Weird Colorado Laws
One may not mutilate a rock in a state park.
Car dealers may not show cars on a Sunday.
It is illegal for liquor stores to sell food or grocery stores to sell any alcohol except beer that is at most 3%.
No liquor may be sold on Sundays or election days.
It is illegal to ride a horse while under the influence.
Tags may be ripped off of pillows and mattresses.
In Alamosa - Throwing missles at cars is illegal.
In Alamosa - Keeping a house where unmarried persons are allowed to have sex is prohibited.
In Alamosa - To own a dog over three months of age, one must obtain a license.
In Alamosa - Persons may not urinate in public.
In Arvada - Establishments which sell alcohol must have enough lighting to read text inside them.
In Aspen - Catapults may not be fired at buildings.
In Boulder - It is legal to challenge a police officer, but only until he or she asks you to stop.
In Boulder - It is illegal to permit ones llama to graze on city property.
In Boulder - Boulders may not be rolled on city property.
In Boulder - Couches may not be placed on outside porches.
In Colorado Springs - It is permissable to wear a holstered six-gun within city limits, except on Sunday, Election Day, or holidays.
In Cripple Creek - It is illegal to bring your horse or pack mule above the ground floor of any building.
In Denver - The dog catcher must notify dogs of impounding by posting, for three consecutive days, a notice on a tree in the city park and along a public road running through said park.
In Denver - It is unlawful to lend your vacuum cleaner to your next-door neighbor.
In Denver - You may not drive a black car on Sundays.
In Denver - It is illegal to mistreat rats in Denver, Colorado.
In Durango - It is illegal to go in public dressed in clothes "unbecoming" on one's sex.
In Logan County - It is illegal for a man to kiss a woman while she is asleep. Source
In Louisville - Residents may not own chickens, but may own up to three turkeys.
In Pueblo - It is illegal to let a dandelion grow within the city limits.
In Sterling - Cats may not run loose without having been fit with a taillight.
In Vail - It is illegal to crash into obstacles on a ski slope.
In Vail - No one may keep junk close to someone else.