By Por Jaijongkit | The Colorado Sun
Firearms and projectile weapons including paintball guns and slingshots are prohibited in all parks and open space in unincorporated Boulder County.
Open and concealed carry of firearms are also prohibited in other “sensitive” public areas including hospitals, county government buildings, child care centers and polling places. The ordinance says the presence of firearms in those locations poses unreasonable risks of gun violence.
A person can generally be charged only if these locations post signs regarding the prohibition. A conviction is punishable by up to 364 days in jail. Boulder County also prohibits the sale of firearms to people younger than 21 and has a 10-day waiting period for gun sales.