Flagstaff Mountain in Boulder County, Colorado. Liions in the front range foothills are aggressive, often approach hikers, don’t seen to fear humans much at all. Years ago a young man was killed near Idaho Springs, Colorado and a pre-schooler was taken by a lion on a trail in Poudre Canyon a few years back. Several times a year lions threaten humans without attacking.
Carrying a gun for self defense against dangerous animals is becoming more common.