Mountain lions are nocturnal animals. They live in mountains and forests. They feed on large mammals such as deer, and they can reach up to ten thousand feet in elevation. Unlike other cats, however, mountain lions seem to be particularly attracted to kids. While they may not be particularly dangerous, they do seem to perceive children as easy prey. Small children can make a great threat to mountain lions, so they will usually try to run away from them. That said, running away from a mountain wolf or cat could trigger a lion's instinct to chase after them.