Mountain lion. By now, I began to fantasize about my new career in animal tracking. And so I spent days on the internet trying to figure out this one.
Large mammal with three toes. Probably hooved. Clearly not extinct and, because of the gait pattern, unlikely to be Sasquatch. I couldn't find anything on the web. I poured over the books of tracks in every Ranger Station gift shop. Finally, I showed it to Nice Ranger Lady and she knew immediately.
Okay, scroll down.
And if you said "one elk following another," you are right.