Man, of course this comes down the day the Pac 12 is deciding. No ones fault other than the students themselves. Can't blame the health officials as they have to control what is going on.
However, with my experience with health departments and COVID, health officials typically will work with groups, say the CU football program. Ultimately, they don't want them going some place else, practicing, lifting, and doing everything else and have that possibility of transmitting. Ultimately, there is nothing BOCO can do to control them from leaving and doing so. I would think BOCO would work with the AD on an exemption. The AD seems to have been extremely diligent with their approach so far (other than hiking gate).