This is kind of funny. In Colorado, along Interstate 70, the 420 mile marker has been stolen, repeatedly! Authorities finally smartened up and replaced it with a 419.99 mile marker. You see, Colorado recently legalized the sale, possession and use of Marijuana. The number 420 or the time 4:20 or the date 4/20 have long been associated with Marijuana use. I covered this earlier. To see the folklore origin of "420" click here.