Colorado State - Colorado are stopping their series after 2020. Everybody on both sides aren't happy. It's one of the most anticipated games for both teams every year. So dumb to end it. Downtown Denver employees, almost all, are one schools shirt the day of game. Even people that don't get into football get into that game. I love it! Love watching in-state rivalry games!
Haven't read beyond this post so my comment might duplicate another, but your statement about downtown Denver employees, almost all, wearing CU/CSU colors the day of the game couldn't be further from the truth. I worked in downtown Denver from 2002-2010 and get back down there every once in a while since, and college football barely resonates in the city. Mile High Stadium is half full, CU has been down for quite some time and half the city seems to be transplants(myself included, from 2000), so this game really doesn't mean a great deal to the area.
The game should be played and it is relevant to a degree, but college football is way down the list on relevant items in downtown Denver( outside the sports column and a few other sports bars that act as gathering spots for out of state college football teams). From the Broncos to Avalanche, skiing, hiking, etc., college football doesn't have much of a presence in this state. At least that is my interpretation.