They are completely carnivorous, so you won't hear them ordering a side salad to go with dinner, which can range from deer to elk to porcupines. Mountain lions hunt for survival, not for sport. If they can't finish an entire kill in one meal, they'll cover it with leaves and brush then come back to it later. They are solitary and territorial, except when they are breeding or with their kittens. Two to four kittens are common, and kits can be born anytime during the year.
Mountain lions avoid humans as much as possible, but that's sadly less possible than ever now.
As humans move deeper and deeper into mountain lion habitat, more encounters are occurring between mountain lions and humans. If you do encounter a mountain lion, your best defense is to make sure you don't act like food. Yell, flap your coat, and try to make yourself look larger and more menacing. This will spook the cat and convince it to look for an easier meal elsewhere. Avoid instinctively running, as this will make you seem like typical prey.