the series was renewed, and I mean renewed as in they signed a new contract this year. I know your Utah education limits your grammar a bit so I'll go slow.
Here is a link of Colorado's future non-conference opponents
http://www.fbschedules.com/ncaa/big-12/colorado-buffaloes.php
notice the two words "Colorado" and "State" put together, that is Colorado State a non-conference in-state rival
Now see how they play until 2020
need me to go by that again?