It is Colorado's oldest penitentiary, nestled at the foothills of the Rocky Mountains in Southern Colorado.It can trace its roots back to the days of frontier justice. Welcome to the State Prison in Canon City, Colorado. It's more than just a penitentiary--today, it's a clearing house for most of the convicted male felons in the state. Their ages range from 19 to 66 years old. Their sentences, anything from one year to life in prison. Institution has housed prisoners ranging from cannibal Alfred Packer to a heavyweight boxing contender.