I periodically get requests for information about classification and all-classification records.
Craig Bailey faithfully keeps the all-classification and state meet classification records up-to-date for CHSAA. Those show up in the CHSAA track and field bulletin and the state meet program each year.
I have also kept those updated here on Colorado Track XC, plus I keep classification records (whether or not achieved at the state meet) here as well.
The season is approaching and folks are starting to show interest in this sort of thing again, so you will find below links to all of the records, or you can simply step through them one page at a time. Note that both the records shown here and the records CHSAA keeps up with are limited to meets held here in Colorado and within the state-sanctioned season.