A bull moose in Colorado (Photo: Backcountry Hunters and Anglers)
I personally never saw a Colorado moose until 2019 -- in North Park, of course -- although I had looked for them before, both there and around Lake City in southwestern Colorado.
Since their introduction in the late 1970s, they have spread out from North Park both on their own and with human help.
Here is an interesting long read about that process, "Of Moose and Men." I had not idea that Marlin Perkins' Mutual of Omaha's Wild Kingdom was still being broadcast in 1978 and that the old nature-faker managed to insert himself into the moose transfers.