I've had multiple encounters with moose while fishing in the Wind River mountains. Fishing on the North Platte this spring came across a beaver who slapped his tail telling us we must have took his hole.

A couple of years ago, had my scariest incident. a bison decided to camp out on an island. Problem was that island was the best place to cross the Soda Butte to get back to the parking lot. Eventually he moved on, and I was able to get back across. Not 5 minutes later, the entire herd came down from the hill side to drink out of the river right where I had been fishing. Bison is the 2nd most frightening animal for me, after grizzily.