Terrance (Toyota Echo) has successfully (though not without protest) driven up and around the rocky mountains.
(1) herd of bighorn sheep.
(4+) herds of elk
(20+) various small mammals including chipmunks, chickarees, and pikas
A guide booklet the park gives out mentions precautions to take if attacked by a mountain lion or bear: “Do not turn around. back away slowly. Make yourself as large as possible and make loud noises. Pick up small children. If attacked, FIGHT BACK!”
Now you know.