Last confirmed grizzly bear sighting in CO was 40 years ago.....its dead. Your biggest fears of big game hunting in CO should come from two sources.
Ed Wiseman Toneda OUtftters was mauled by a grizzly in 1980 in COLORADO. That was more then a sighting and it happened 28 years ago. There is evidence they are back in the state real good evidence.
My neighbors dog is more dangerous than all the bears and cats you could find in the state.
That is until the bear or cat decides to take you. I have yet to run into an outfitter in Co that was not packing a handgun during archery ELk and Deer season.